EsenthalEngine/ThirdPartyLibs/Snappy/ChangeLog

commit eb66d8176b3d1f560ee012e1b488cb1540c45f88
Author: Steinar H. Gunderson <[email protected]>
Date:   Mon Jun 22 16:10:47 2015 +0200

    Initialized members of SnappyArrayWriter and SnappyDecompressionValidator.
    These members were almost surely initialized before use by other member
    functions, but Coverity was warning about this. Eliminating these warnings
    minimizes clutter in that report and the likelihood of overlooking a real bug.
    
    A=cmumford
    R=jeff

commit b2312c4c25883ab03b5110f1b006dce95f419a4f
Author: Steinar H. Gunderson <[email protected]>
Date:   Mon Jun 22 16:03:28 2015 +0200

    Add support for Uncompress(source, sink). Various changes to allow
    Uncompress(source, sink) to get the same performance as the different
    variants of Uncompress to Cord/DataBuffer/String/FlatBuffer.
    
    Changes to efficiently support Uncompress(source, sink)
    --------
    
    a) For strings - we add support to StringByteSink to do GetAppendBuffer so we
       can write to it without copying.
    b) For flat array buffers, we do GetAppendBuffer and see if we can get a full buffer.
    
    With the above changes we get performance with ByteSource/ByteSink
    that is	very close to directly using flat arrays and strings.
    
    We add various benchmark cases to demonstrate that.
    
    Orthogonal change
    ------------------
    
    Add support for TryFastAppend() for SnappyScatteredWriter.
    
    Benchmark results are below
    
    CPU: Intel Core2 dL1:32KB dL2:4096KB
    Benchmark              Time(ns)    CPU(ns) Iterations
    -----------------------------------------------------
    BM_UFlat/0               109065     108996       6410 896.0MB/s  html
    BM_UFlat/1              1012175    1012343        691 661.4MB/s  urls
    BM_UFlat/2                26775      26771      26149 4.4GB/s  jpg
    BM_UFlat/3                48947      48940      14363 1.8GB/s  pdf
    BM_UFlat/4               441029     440835       1589 886.1MB/s  html4
    BM_UFlat/5                39861      39880      17823 588.3MB/s  cp
    BM_UFlat/6                18315      18300      38126 581.1MB/s  c
    BM_UFlat/7                 5254       5254     100000 675.4MB/s  lsp
    BM_UFlat/8              1568060    1567376        447 626.6MB/s  xls
    BM_UFlat/9               337512     337734       2073 429.5MB/s  txt1
    BM_UFlat/10              287269     287054       2434 415.9MB/s  txt2
    BM_UFlat/11              890098     890219        787 457.2MB/s  txt3
    BM_UFlat/12             1186593    1186863        590 387.2MB/s  txt4
    BM_UFlat/13              573927     573318       1000 853.7MB/s  bin
    BM_UFlat/14               64250      64294      10000 567.2MB/s  sum
    BM_UFlat/15                7301       7300      96153 552.2MB/s  man
    BM_UFlat/16              109617     109636       6375 1031.5MB/s  pb
    BM_UFlat/17              364438     364497       1921 482.3MB/s  gaviota
    BM_UFlatSink/0           108518     108465       6450 900.4MB/s  html
    BM_UFlatSink/1           991952     991997        705 675.0MB/s  urls
    BM_UFlatSink/2            26815      26798      26065 4.4GB/s  jpg
    BM_UFlatSink/3            49127      49122      14255 1.8GB/s  pdf
    BM_UFlatSink/4           436674     436731       1604 894.4MB/s  html4
    BM_UFlatSink/5            39738      39733      17345 590.5MB/s  cp
    BM_UFlatSink/6            18413      18416      37962 577.4MB/s  c
    BM_UFlatSink/7             5677       5676     100000 625.2MB/s  lsp
    BM_UFlatSink/8          1552175    1551026        451 633.2MB/s  xls
    BM_UFlatSink/9           338526     338489       2065 428.5MB/s  txt1
    BM_UFlatSink/10          289387     289307       2420 412.6MB/s  txt2
    BM_UFlatSink/11          893803     893706        783 455.4MB/s  txt3
    BM_UFlatSink/12         1195919    1195459        586 384.4MB/s  txt4
    BM_UFlatSink/13          559637     559779       1000 874.3MB/s  bin
    BM_UFlatSink/14           65073      65094      10000 560.2MB/s  sum
    BM_UFlatSink/15            7618       7614      92823 529.5MB/s  man
    BM_UFlatSink/16          110085     110121       6352 1027.0MB/s  pb
    BM_UFlatSink/17          369196     368915       1896 476.5MB/s  gaviota
    BM_UValidate/0            46954      46957      14899 2.0GB/s  html
    BM_UValidate/1           500621     500868       1000 1.3GB/s  urls
    BM_UValidate/2              283        283    2481447 417.2GB/s  jpg
    BM_UValidate/3            16230      16228      43137 5.4GB/s  pdf
    BM_UValidate/4           189129     189193       3701 2.0GB/s  html4
    
    A=uday
    R=sanjay

commit b2ad96006741d40935db2f73194a3e489b467338
Author: Steinar H. Gunderson <[email protected]>
Date:   Mon Jun 22 15:48:29 2015 +0200

    Changes to eliminate compiler warnings on MSVC
    
    This code was not compiling under Visual Studio 2013 with warnings being treated
    as errors. Specifically:
    
    1. Changed int -> size_t to eliminate signed/unsigned mismatch warning.
    2. Added some missing return values to functions.
    3. Inserting character instead of integer literals into strings to avoid type
       conversions.
    
    A=cmumford
    R=jeff

commit e7a897e187e90b33f87bd9e64872cf561de9ebca
Author: Steinar H. Gunderson <[email protected]>
Date:   Mon Jun 22 15:45:11 2015 +0200

    Fixed unit tests to compile under MSVC.
    
    1. Including config.h in test.
    2. Including windows.h before zippy-test.h.
    3. Removed definition of WIN32_LEAN_AND_MEAN. This caused problems in
       build environments that define WIN32_LEAN_AND_MEAN as our
       definition didn't check for prior existence. This constant is old
       and no longer needed anyhow.
    4. Disable MSVC warning 4722 since ~LogMessageCrash() never returns.
    
    A=cmumford
    R=jeff

commit 86eb8b152bdb065ad11bf331a9f7d65b72616acf
Author: Steinar H. Gunderson <[email protected]>
Date:   Mon Jun 22 15:41:30 2015 +0200

    Change a few branch annotations that profiling found to be wrong.
    Overall performance is neutral or slightly positive.
    
    Westmere (64-bit, opt):
    
    Benchmark               Base (ns)  New (ns)                                Improvement
    --------------------------------------------------------------------------------------
    BM_UFlat/0                  73798     71464  1.3GB/s  html                    +3.3%
    BM_UFlat/1                 715223    704318  953.5MB/s  urls                  +1.5%
    BM_UFlat/2                   8137      8871  13.0GB/s  jpg                    -8.3%
    BM_UFlat/3                    200       204  935.5MB/s  jpg_200               -2.0%
    BM_UFlat/4                  21627     21281  4.5GB/s  pdf                     +1.6%
    BM_UFlat/5                 302806    290350  1.3GB/s  html4                   +4.3%
    BM_UFlat/6                 218920    219017  664.1MB/s  txt1                  -0.0%
    BM_UFlat/7                 190437    191212  626.1MB/s  txt2                  -0.4%
    BM_UFlat/8                 584192    580484  703.4MB/s  txt3                  +0.6%
    BM_UFlat/9                 776537    779055  591.6MB/s  txt4                  -0.3%
    BM_UFlat/10                 76056     72606  1.5GB/s  pb                      +4.8%
    BM_UFlat/11                235962    239043  737.4MB/s  gaviota               -1.3%
    BM_UFlat/12                 28049     28000  840.1MB/s  cp                    +0.2%
    BM_UFlat/13                 12225     12021  886.9MB/s  c                     +1.7%
    BM_UFlat/14                  3362      3544  1004.0MB/s  lsp                  -5.1%
    BM_UFlat/15                937015    939206  1048.9MB/s  xls                  -0.2%
    BM_UFlat/16                   236       233  823.1MB/s  xls_200               +1.3%
    BM_UFlat/17                373170    361947  1.3GB/s  bin                     +3.1%
    BM_UFlat/18                   264       264  725.5MB/s  bin_200               +0.0%
    BM_UFlat/19                 42834     43577  839.2MB/s  sum                   -1.7%
    BM_UFlat/20                  4770      4736  853.6MB/s  man                   +0.7%
    BM_UValidate/0              39671     39944  2.4GB/s  html                    -0.7%
    BM_UValidate/1             443391    443391  1.5GB/s  urls                    +0.0%
    BM_UValidate/2                163       163  703.3GB/s  jpg                   +0.0%
    BM_UValidate/3                113       112  1.7GB/s  jpg_200                 +0.9%
    BM_UValidate/4               7555      7608  12.6GB/s  pdf                    -0.7%
    BM_ZFlat/0                 157616    157568  621.5MB/s  html (22.31 %)        +0.0%
    BM_ZFlat/1                1997290   2014486  333.4MB/s  urls (47.77 %)        -0.9%
    BM_ZFlat/2                  23035     22237  5.2GB/s  jpg (99.95 %)           +3.6%
    BM_ZFlat/3                    539       540  354.5MB/s  jpg_200 (73.00 %)     -0.2%
    BM_ZFlat/4                  80709     81369  1.2GB/s  pdf (81.85 %)           -0.8%
    BM_ZFlat/5                 639059    639220  613.0MB/s  html4 (22.51 %)       -0.0%
    BM_ZFlat/6                 577203    583370  249.3MB/s  txt1 (57.87 %)        -1.1%
    BM_ZFlat/7                 510887    516094  232.0MB/s  txt2 (61.93 %)        -1.0%
    BM_ZFlat/8                1535843   1556973  262.2MB/s  txt3 (54.92 %)        -1.4%
    BM_ZFlat/9                2070068   2102380  219.3MB/s  txt4 (66.22 %)        -1.5%
    BM_ZFlat/10                152396    152148  745.5MB/s  pb (19.64 %)          +0.2%
    BM_ZFlat/11                447367    445859  395.4MB/s  gaviota (37.72 %)     +0.3%
    BM_ZFlat/12                 76375     76797  306.3MB/s  cp (48.12 %)          -0.5%
    BM_ZFlat/13                 31518     31987  333.3MB/s  c (42.40 %)           -1.5%
    BM_ZFlat/14                 10598     10827  328.6MB/s  lsp (48.37 %)         -2.1%
    BM_ZFlat/15               1782243   1802728  546.5MB/s  xls (41.23 %)         -1.1%
    BM_ZFlat/16                   526       539  355.0MB/s  xls_200 (78.00 %)     -2.4%
    BM_ZFlat/17                598141    597311  822.1MB/s  bin (18.11 %)         +0.1%
    BM_ZFlat/18                   121       120  1.6GB/s  bin_200 (7.50 %)        +0.8%
    BM_ZFlat/19                109981    112173  326.0MB/s  sum (48.96 %)         -2.0%
    BM_ZFlat/20                 14355     14575  277.4MB/s  man (59.36 %)         -1.5%
    Sum of all benchmarks    33882722  33879325                                   +0.0%
    
    Sandy Bridge (64-bit, opt):
    
    Benchmark               Base (ns)  New (ns)                                Improvement
    --------------------------------------------------------------------------------------
    BM_UFlat/0                  43764     41600  2.3GB/s  html                    +5.2%
    BM_UFlat/1                 517990    507058  1.3GB/s  urls                    +2.2%
    BM_UFlat/2                   6625      5529  20.8GB/s  jpg                   +19.8%
    BM_UFlat/3                    154       155  1.2GB/s  jpg_200                 -0.6%
    BM_UFlat/4                  12795     11747  8.1GB/s  pdf                     +8.9%
    BM_UFlat/5                 200335    193413  2.0GB/s  html4                   +3.6%
    BM_UFlat/6                 156574    156426  929.2MB/s  txt1                  +0.1%
    BM_UFlat/7                 137574    137464  870.4MB/s  txt2                  +0.1%
    BM_UFlat/8                 422551    421603  967.4MB/s  txt3                  +0.2%
    BM_UFlat/9                 577749    578985  795.6MB/s  txt4                  -0.2%
    BM_UFlat/10                 42329     39362  2.8GB/s  pb                      +7.5%
    BM_UFlat/11                170615    169751  1037.9MB/s  gaviota              +0.5%
    BM_UFlat/12                 12800     12719  1.8GB/s  cp                      +0.6%
    BM_UFlat/13                  6585      6579  1.6GB/s  c                       +0.1%
    BM_UFlat/14                  2066      2044  1.7GB/s  lsp                     +1.1%
    BM_UFlat/15                750861    746911  1.3GB/s  xls                     +0.5%
    BM_UFlat/16                   188       192  996.0MB/s  xls_200               -2.1%
    BM_UFlat/17                271622    264333  1.8GB/s  bin                     +2.8%
    BM_UFlat/18                   208       207  923.6MB/s  bin_200               +0.5%
    BM_UFlat/19                 24667     24845  1.4GB/s  sum                     -0.7%
    BM_UFlat/20                  2663      2662  1.5GB/s  man                     +0.0%
    BM_ZFlat/0                 115173    115624  846.5MB/s  html (22.31 %)        -0.4%
    BM_ZFlat/1                1530331   1537769  436.5MB/s  urls (47.77 %)        -0.5%
    BM_ZFlat/2                  17503     17013  6.8GB/s  jpg (99.95 %)           +2.9%
    BM_ZFlat/3                    385       385  496.3MB/s  jpg_200 (73.00 %)     +0.0%
    BM_ZFlat/4                  61753     61540  1.6GB/s  pdf (81.85 %)           +0.3%
    BM_ZFlat/5                 484806    483356  810.1MB/s  html4 (22.51 %)       +0.3%
    BM_ZFlat/6                 464143    467609  310.9MB/s  txt1 (57.87 %)        -0.7%
    BM_ZFlat/7                 410315    413319  289.5MB/s  txt2 (61.93 %)        -0.7%
    BM_ZFlat/8                1244082   1249381  326.5MB/s  txt3 (54.92 %)        -0.4%
    BM_ZFlat/9                1696914   1709685  269.4MB/s  txt4 (66.22 %)        -0.7%
    BM_ZFlat/10                104148    103372  1096.7MB/s  pb (19.64 %)         +0.8%
    BM_ZFlat/11                363522    359722  489.8MB/s  gaviota (37.72 %)     +1.1%
    BM_ZFlat/12                 47021     50095  469.3MB/s  cp (48.12 %)          -6.1%
    BM_ZFlat/13                 16888     16985  627.4MB/s  c (42.40 %)           -0.6%
    BM_ZFlat/14                  5496      5469  650.3MB/s  lsp (48.37 %)         +0.5%
    BM_ZFlat/15               1460713   1448760  679.5MB/s  xls (41.23 %)         +0.8%
    BM_ZFlat/16                   387       393  486.8MB/s  xls_200 (78.00 %)     -1.5%
    BM_ZFlat/17                457654    451462  1086.6MB/s  bin (18.11 %)        +1.4%
    BM_ZFlat/18                    97        87  2.1GB/s  bin_200 (7.50 %)       +11.5%
    BM_ZFlat/19                 77904     80924  451.7MB/s  sum (48.96 %)         -3.7%
    BM_ZFlat/20                  7648      7663  527.1MB/s  man (59.36 %)         -0.2%
    Sum of all benchmarks    25493635  25482069                                   +0.0%
    
    A=dehao
    R=sesse

commit 11ccdfb868387e56d845766d89ddab9d489c4128
Author: Steinar H. Gunderson <[email protected]>
Date:   Mon Jun 22 16:07:58 2015 +0200

    Sync with various Google-internal changes.
    
    Should not mean much for the open-source version.

commit 22acaf438ed93ab21a2ff1919d173206798b996e
Author: Steinar H. Gunderson <[email protected]>
Date:   Mon Jun 22 15:39:08 2015 +0200

    Change some internal path names.
    
    This is mostly to sync up with some changes from Google's internal
    repositories; it does not affect the open-source distribution in itself.

commit 1ff9be9b8fafc8528ca9e055646f5932aa5db9c4
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Feb 28 11:18:07 2014 +0000

    Release Snappy 1.1.2.
    
    R=jeff
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@84 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 19690d78e83f8963f497585031efa3d9ca66b807
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Feb 19 10:31:49 2014 +0000

    Fix public issue 82: Stop distributing benchmark data files that have
    unclear or unsuitable licensing.
    
    In general, we replace the files we can with liberally licensed data,
    and remove all the others (in particular all the parts of the Canterbury
    corpus that are not clearly in the public domain). The replacements
    do not always have the exact same characteristics as the original ones,
    but they are more than good enough to be useful for benchmarking.
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@83 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit f82bff66afe0de4c9ae22f8c4ef84e3c2233e799
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Oct 25 13:31:27 2013 +0000

    Add support for padding in the Snappy framed format.
    
    This is specifically motivated by DICOM's demands that embedded data
    must be of an even number of bytes, but could in principle be used for
    any sort of padding/alignment needed.
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@82 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit eeead8dc38ea359f027fb6e89f345448e8e9d723
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue Oct 15 15:21:31 2013 +0000

    Release Snappy 1.1.1.
    
    R=jeff
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@81 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 6bc39e24c76adbbff26ae629fafbf7dfc795f554
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue Aug 13 12:55:00 2013 +0000

    Add autoconf tests for size_t and ssize_t. Sort-of resolves public issue 79;
    it would solve the problem if MSVC typically used autoconf. However, it gives
    a natural place (config.h) to put the typedef even for MSVC.
    
    R=jsbell
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@80 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 7c3c01df77e191ad1f8377448961fe88db2802e9
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Mon Jul 29 11:06:44 2013 +0000

    When we compare the number of bytes produced with the offset for a
    backreference, make the signedness of the bytes produced clear,
    by sticking it into a size_t. This avoids a signed/unsigned compare
    warning from MSVC (public issue 71), and also is slightly clearer.
    
    Since the line is now so long the explanatory comment about the -1u
    trick has to go somewhere else anyway, I used the opportunity to
    explain it in slightly more detail.
    
    This is a purely stylistic change; the emitted assembler from GCC
    is identical.
    
    R=jeff
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@79 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 2f0aaf8631d8fb2475ca1a6687c181efb14ed286
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Sun Jun 30 19:24:03 2013 +0000

    In the fast path for decompressing literals, instead of checking
    whether there's 16 bytes free and then checking right afterwards
    (when having subtracted the literal size) that there are now
    5 bytes free, just check once for 21 bytes. This skips a compare
    and a branch; although it is easily predictable, it is still
    a few cycles on a fast path that we would like to get rid of.
    
    Benchmarking this yields very confusing results. On open-source
    GCC 4.8.1 on Haswell, we get exactly the expected results; the
    benchmarks where we hit the fast path for literals (in particular
    the two HTML benchmarks and the protobuf benchmark) give very nice
    speedups, and the others are not really affected.
    
    However, benchmarks with Google's GCC branch on other hardware
    is much less clear. It seems that we have a weak loss in some cases
    (and the win for the “typical” win cases are not nearly as clear),
    but that it depends on microarchitecture and plain luck in how we run
    the benchmark. Looking at the generated assembler, it seems that
    the removal of the if causes other large-scale changes in how the
    function is laid out, which makes it likely that this is just bad luck.
    
    Thus, we should keep this change, even though its exact current impact is
    unclear; it's a sensible change per se, and dropping it on the basis of
    microoptimization for a given compiler (or even branch of a compiler)
    would seem like a bad strategy in the long run.
    
    Microbenchmark results (all in 64-bit, opt mode):
    
      Nehalem, Google GCC:
    
      Benchmark                Base (ns)  New (ns)                       Improvement
      ------------------------------------------------------------------------------
      BM_UFlat/0                   76747     75591  1.3GB/s  html           +1.5%
      BM_UFlat/1                  765756    757040  886.3MB/s  urls         +1.2%
      BM_UFlat/2                   10867     10893  10.9GB/s  jpg           -0.2%
      BM_UFlat/3                     124       131  1.4GB/s  jpg_200        -5.3%
      BM_UFlat/4                   31663     31596  2.8GB/s  pdf            +0.2%
      BM_UFlat/5                  314162    308176  1.2GB/s  html4          +1.9%
      BM_UFlat/6                   29668     29746  790.6MB/s  cp           -0.3%
      BM_UFlat/7                   12958     13386  796.4MB/s  c            -3.2%
      BM_UFlat/8                    3596      3682  966.0MB/s  lsp          -2.3%
      BM_UFlat/9                 1019193   1033493  953.3MB/s  xls          -1.4%
      BM_UFlat/10                    239       247  775.3MB/s  xls_200      -3.2%
      BM_UFlat/11                 236411    240271  606.9MB/s  txt1         -1.6%
      BM_UFlat/12                 206639    209768  571.2MB/s  txt2         -1.5%
      BM_UFlat/13                 627803    635722  641.4MB/s  txt3         -1.2%
      BM_UFlat/14                 845932    857816  538.2MB/s  txt4         -1.4%
      BM_UFlat/15                 402107    391670  1.2GB/s  bin            +2.7%
      BM_UFlat/16                    283       279  683.6MB/s  bin_200      +1.4%
      BM_UFlat/17                  46070     46815  781.5MB/s  sum          -1.6%
      BM_UFlat/18                   5053      5163  782.0MB/s  man          -2.1%
      BM_UFlat/19                  79721     76581  1.4GB/s  pb             +4.1%
      BM_UFlat/20                 251158    252330  697.5MB/s  gaviota      -0.5%
      Sum of all benchmarks      4966150   4980396                          -0.3%
    
    
      Sandy Bridge, Google GCC:
    
      Benchmark                Base (ns)  New (ns)                       Improvement
      ------------------------------------------------------------------------------
      BM_UFlat/0                   42850     42182  2.3GB/s  html           +1.6%
      BM_UFlat/1                  525660    515816  1.3GB/s  urls           +1.9%
      BM_UFlat/2                    7173      7283  16.3GB/s  jpg           -1.5%
      BM_UFlat/3                      92        91  2.1GB/s  jpg_200        +1.1%
      BM_UFlat/4                   15147     14872  5.9GB/s  pdf            +1.8%
      BM_UFlat/5                  199936    192116  2.0GB/s  html4          +4.1%
      BM_UFlat/6                   12796     12443  1.8GB/s  cp             +2.8%
      BM_UFlat/7                    6588      6400  1.6GB/s  c              +2.9%
      BM_UFlat/8                    2010      1951  1.8GB/s  lsp            +3.0%
      BM_UFlat/9                  761124    763049  1.3GB/s  xls            -0.3%
      BM_UFlat/10                    186       189  1016.1MB/s  xls_200     -1.6%
      BM_UFlat/11                 159354    158460  918.6MB/s  txt1         +0.6%
      BM_UFlat/12                 139732    139950  856.1MB/s  txt2         -0.2%
      BM_UFlat/13                 429917    425027  961.7MB/s  txt3         +1.2%
      BM_UFlat/14                 585255    587324  785.8MB/s  txt4         -0.4%
      BM_UFlat/15                 276186    266173  1.8GB/s  bin            +3.8%
      BM_UFlat/16                    205       207  925.5MB/s  bin_200      -1.0%
      BM_UFlat/17                  24925     24935  1.4GB/s  sum            -0.0%
      BM_UFlat/18                   2632      2576  1.5GB/s  man            +2.2%
      BM_UFlat/19                  40546     39108  2.8GB/s  pb             +3.7%
      BM_UFlat/20                 175803    168209  1048.9MB/s  gaviota     +4.5%
      Sum of all benchmarks      3408117   3368361                          +1.2%
    
    
      Haswell, upstream GCC 4.8.1:
    
      Benchmark                Base (ns)  New (ns)                       Improvement
      ------------------------------------------------------------------------------
      BM_UFlat/0                   46308     40641  2.3GB/s  html          +13.9%
      BM_UFlat/1                  513385    514706  1.3GB/s  urls           -0.3%
      BM_UFlat/2                    6197      6151  19.2GB/s  jpg           +0.7%
      BM_UFlat/3                      61        61  3.0GB/s  jpg_200        +0.0%
      BM_UFlat/4                   13551     13429  6.5GB/s  pdf            +0.9%
      BM_UFlat/5                  198317    190243  2.0GB/s  html4          +4.2%
      BM_UFlat/6                   14768     12560  1.8GB/s  cp            +17.6%
      BM_UFlat/7                    6453      6447  1.6GB/s  c              +0.1%
      BM_UFlat/8                    1991      1980  1.8GB/s  lsp            +0.6%
      BM_UFlat/9                  766947    770424  1.2GB/s  xls            -0.5%
      BM_UFlat/10                    170       169  1.1GB/s  xls_200        +0.6%
      BM_UFlat/11                 164350    163554  888.7MB/s  txt1         +0.5%
      BM_UFlat/12                 145444    143830  832.1MB/s  txt2         +1.1%
      BM_UFlat/13                 437849    438413  929.2MB/s  txt3         -0.1%
      BM_UFlat/14                 603587    605309  759.8MB/s  txt4         -0.3%
      BM_UFlat/15                 249799    248067  1.9GB/s  bin            +0.7%
      BM_UFlat/16                    191       188  1011.4MB/s  bin_200     +1.6%
      BM_UFlat/17                  26064     24778  1.4GB/s  sum            +5.2%
      BM_UFlat/18                   2620      2601  1.5GB/s  man            +0.7%
      BM_UFlat/19                  44551     37373  3.0GB/s  pb            +19.2%
      BM_UFlat/20                 165408    164584  1.0GB/s  gaviota        +0.5%
      Sum of all benchmarks      3408011   3385508                          +0.7%
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@78 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 062bf544a61107db730b6d08cb0b159c4dd9b24c
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Jun 14 21:42:26 2013 +0000

    Make the two IncrementalCopy* functions take in an ssize_t instead of a len,
    in order to avoid having to do 32-to-64-bit signed conversions on a hot path
    during decompression. (Also fixes some MSVC warnings, mentioned in public
    issue 75, but more of those remain.) They cannot be size_t because we expect
    them to go negative and test for that.
    
    This saves a few movzwl instructions, yielding ~2% speedup in decompression.
    
    
    Sandy Bridge:
    
    Benchmark                          Base (ns)  New (ns)                                Improvement
    -------------------------------------------------------------------------------------------------
    BM_UFlat/0                             48009     41283  2.3GB/s  html                   +16.3%
    BM_UFlat/1                            531274    513419  1.3GB/s  urls                    +3.5%
    BM_UFlat/2                              7378      7062  16.8GB/s  jpg                    +4.5%
    BM_UFlat/3                                92        92  2.0GB/s  jpg_200                 +0.0%
    BM_UFlat/4                             15057     14974  5.9GB/s  pdf                     +0.6%
    BM_UFlat/5                            204323    193140  2.0GB/s  html4                   +5.8%
    BM_UFlat/6                             13282     12611  1.8GB/s  cp                      +5.3%
    BM_UFlat/7                              6511      6504  1.6GB/s  c                       +0.1%
    BM_UFlat/8                              2014      2030  1.7GB/s  lsp                     -0.8%
    BM_UFlat/9                            775909    768336  1.3GB/s  xls                     +1.0%
    BM_UFlat/10                              182       184  1043.2MB/s  xls_200              -1.1%
    BM_UFlat/11                           167352    161630  901.2MB/s  txt1                  +3.5%
    BM_UFlat/12                           147393    142246  842.8MB/s  txt2                  +3.6%
    BM_UFlat/13                           449960    432853  944.4MB/s  txt3                  +4.0%
    BM_UFlat/14                           620497    594845  775.9MB/s  txt4                  +4.3%
    BM_UFlat/15                           265610    267356  1.8GB/s  bin                     -0.7%
    BM_UFlat/16                              206       205  932.7MB/s  bin_200               +0.5%
    BM_UFlat/17                            25561     24730  1.4GB/s  sum                     +3.4%
    BM_UFlat/18                             2620      2644  1.5GB/s  man                     -0.9%
    BM_UFlat/19                            45766     38589  2.9GB/s  pb                     +18.6%
    BM_UFlat/20                           171107    169832  1039.5MB/s  gaviota              +0.8%
    Sum of all benchmarks                3500103   3394565                                   +3.1%
    
    
    Westmere:
    
    Benchmark                          Base (ns)  New (ns)                                Improvement
    -------------------------------------------------------------------------------------------------
    BM_UFlat/0                             72624     71526  1.3GB/s  html                    +1.5%
    BM_UFlat/1                            735821    722917  930.8MB/s  urls                  +1.8%
    BM_UFlat/2                             10450     10172  11.7GB/s  jpg                    +2.7%
    BM_UFlat/3                               117       117  1.6GB/s  jpg_200                 +0.0%
    BM_UFlat/4                             29817     29648  3.0GB/s  pdf                     +0.6%
    BM_UFlat/5                            297126    293073  1.3GB/s  html4                   +1.4%
    BM_UFlat/6                             28252     27994  842.0MB/s  cp                    +0.9%
    BM_UFlat/7                             12672     12391  862.1MB/s  c                     +2.3%
    BM_UFlat/8                              3507      3425  1040.9MB/s  lsp                  +2.4%
    BM_UFlat/9                           1004268    969395  1018.0MB/s  xls                  +3.6%
    BM_UFlat/10                              233       227  844.8MB/s  xls_200               +2.6%
    BM_UFlat/11                           230054    224981  647.8MB/s  txt1                  +2.3%
    BM_UFlat/12                           201229    196447  610.5MB/s  txt2                  +2.4%
    BM_UFlat/13                           609547    596761  685.3MB/s  txt3                  +2.1%
    BM_UFlat/14                           824362    804821  573.8MB/s  txt4                  +2.4%
    BM_UFlat/15                           371095    374899  1.3GB/s  bin                     -1.0%
    BM_UFlat/16                              267       267  717.8MB/s  bin_200               +0.0%
    BM_UFlat/17                            44623     43828  835.9MB/s  sum                   +1.8%
    BM_UFlat/18                             5077      4815  841.0MB/s  man                   +5.4%
    BM_UFlat/19                            74964     73210  1.5GB/s  pb                      +2.4%
    BM_UFlat/20                           237987    236745  746.0MB/s  gaviota               +0.5%
    Sum of all benchmarks                4794092   4697659                                   +2.1%
    
    
    Istanbul:
    
    Benchmark                          Base (ns)  New (ns)                                Improvement
    -------------------------------------------------------------------------------------------------
    BM_UFlat/0                             98614     96376  1020.4MB/s  html                 +2.3%
    BM_UFlat/1                            963740    953241  707.2MB/s  urls                  +1.1%
    BM_UFlat/2                             25042     24769  4.8GB/s  jpg                     +1.1%
    BM_UFlat/3                               180       180  1065.6MB/s  jpg_200              +0.0%
    BM_UFlat/4                             45942     45403  1.9GB/s  pdf                     +1.2%
    BM_UFlat/5                            400135    390226  1008.2MB/s  html4                +2.5%
    BM_UFlat/6                             37768     37392  631.9MB/s  cp                    +1.0%
    BM_UFlat/7                             18585     18200  588.2MB/s  c                     +2.1%
    BM_UFlat/8                              5751      5690  627.7MB/s  lsp                   +1.1%
    BM_UFlat/9                           1543154   1542209  641.4MB/s  xls                   +0.1%
    BM_UFlat/10                              381       388  494.6MB/s  xls_200               -1.8%
    BM_UFlat/11                           339715    331973  440.1MB/s  txt1                  +2.3%
    BM_UFlat/12                           294807    289418  415.4MB/s  txt2                  +1.9%
    BM_UFlat/13                           906160    884094  463.3MB/s  txt3                  +2.5%
    BM_UFlat/14                          1224221   1198435  386.1MB/s  txt4                  +2.2%
    BM_UFlat/15                           516277    502923  979.5MB/s  bin                   +2.7%
    BM_UFlat/16                              405       402  477.2MB/s  bin_200               +0.7%
    BM_UFlat/17                            61640     60621  605.6MB/s  sum                   +1.7%
    BM_UFlat/18                             7326      7383  549.5MB/s  man                   -0.8%
    BM_UFlat/19                            94720     92653  1.2GB/s  pb                      +2.2%
    BM_UFlat/20                           360435    346687  510.6MB/s  gaviota               +4.0%
    Sum of all benchmarks                6944998   6828663                                   +1.7%
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@77 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 328aafa1980824a9afdcd50edc30d9d5157e417f
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Thu Jun 13 16:19:52 2013 +0000

    Add support for uncompressing to iovecs (scatter I/O).
    Windows does not have struct iovec defined anywhere,
    so we define our own version that's equal to what UNIX
    typically has.
    
    The bulk of this patch was contributed by Mohit Aron.
    
    R=jeff
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@76 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit cd92eb0852e2339187b693eef3595a07d2276c1d
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Jun 12 19:51:15 2013 +0000

    Some code reorganization needed for an internal change.
    
    R=fikes
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@75 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit a3e928d62bbd61b523b988c07b560253950cf73b
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue Apr 9 15:33:30 2013 +0000

    Supports truncated test data in zippy benchmark.
    
    R=sesse
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@74 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit bde324c0169763688f35ee44630a26ad1f49eec3
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue Feb 5 14:36:15 2013 +0000

    Release Snappy 1.1.0.
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@73 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 8168446c7eaaa0594e1f4ca923376dcf3a2846fa
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue Feb 5 14:30:05 2013 +0000

    Make ./snappy_unittest pass without "srcdir" being defined.
    
    Previously, snappy_unittests would read from an absolute path /testdata/..;
    convert it to use a relative path instead.
    
    Patch from Marc-Antonie Ruel.
    
    R=maruel
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@72 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 27a0cc394950ebdad2e8d67322f0862835b10bd9
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Jan 18 12:16:36 2013 +0000

    Increase the Zippy block size from 32 kB to 64 kB, winning ~3% density
    while being effectively performance neutral.
    
    The longer story about density is that we win 3-6% density on the benchmarks
    where this has any effect at all; many of the benchmarks (cp, c, lsp, man)
    are smaller than 32 kB and thus will have no effect. Binary data also seems
    to win little or nothing; of course, the already-compressed data wins nothing.
    The protobuf benchmark wins as much as ~18% depending on architecture,
    but I wouldn't be too sure that this is representative of protobuf data in
    general.
    
    As of performance, we lose a tiny amount since we get more tags (e.g., a long
    literal might be broken up into literal-copy-literal), but we win it back with
    less clearing of the hash table, and more opportunities to skip incompressible
    data (e.g. in the jpg benchmark). Decompression seems to get ever so slightly
    slower, again due to more tags. The total net change is about as close to zero
    as we can get, so the end effect seems to be simply more density and no
    real performance change.
    
    The comment about not changing kBlockSize, scary as it is, is not really
    relevant, since we're never going to have a block-level decompressor without
    explicitly marked blocks. Replace it with something more appropriate.
    
    This affects the framing format, but it's okay to change it since it basically
    has no users yet.
    
    
    Density (note that cp, c, lsp and man are all smaller than 32 kB):
    
       Benchmark         Description   Base (%)  New (%)  Improvement
       --------------------------------------------------------------
       ZFlat/0           html            22.57    22.31     +5.6%
       ZFlat/1           urls            50.89    47.77     +6.5%
       ZFlat/2           jpg             99.88    99.87     +0.0%
       ZFlat/3           pdf             82.13    82.07     +0.1%
       ZFlat/4           html4           23.55    22.51     +4.6%
       ZFlat/5           cp              48.12    48.12     +0.0%
       ZFlat/6           c               42.40    42.40     +0.0%
       ZFlat/7           lsp             48.37    48.37     +0.0%
       ZFlat/8           xls             41.34    41.23     +0.3%
       ZFlat/9           txt1            59.81    57.87     +3.4%
       ZFlat/10          txt2            64.07    61.93     +3.5%
       ZFlat/11          txt3            57.11    54.92     +4.0%
       ZFlat/12          txt4            68.35    66.22     +3.2%
       ZFlat/13          bin             18.21    18.11     +0.6%
       ZFlat/14          sum             51.88    48.96     +6.0%
       ZFlat/15          man             59.36    59.36     +0.0%
       ZFlat/16          pb              23.15    19.64    +17.9%
       ZFlat/17          gaviota         38.27    37.72     +1.5%
       Geometric mean                    45.51    44.15     +3.1%
    
    
    Microbenchmarks (64-bit, opt):
    
    Westmere 2.8 GHz:
    
       Benchmark                          Base (ns)  New (ns)                                Improvement
       -------------------------------------------------------------------------------------------------
       BM_UFlat/0                             75342     75027  1.3GB/s  html                    +0.4%
       BM_UFlat/1                            723767    744269  899.6MB/s  urls                  -2.8%
       BM_UFlat/2                             10072     10072  11.7GB/s  jpg                    +0.0%
       BM_UFlat/3                             30747     30388  2.9GB/s  pdf                     +1.2%
       BM_UFlat/4                            307353    306063  1.2GB/s  html4                   +0.4%
       BM_UFlat/5                             28593     28743  816.3MB/s  cp                    -0.5%
       BM_UFlat/6                             12958     12998  818.1MB/s  c                     -0.3%
       BM_UFlat/7                              3700      3792  935.8MB/s  lsp                   -2.4%
       BM_UFlat/8                            999685    999905  982.1MB/s  xls                   -0.0%
       BM_UFlat/9                            232954    230079  630.4MB/s  txt1                  +1.2%
       BM_UFlat/10                           200785    201468  592.6MB/s  txt2                  -0.3%
       BM_UFlat/11                           617267    610968  666.1MB/s  txt3                  +1.0%
       BM_UFlat/12                           821595    822475  558.7MB/s  txt4                  -0.1%
       BM_UFlat/13                           377097    377632  1.3GB/s  bin                     -0.1%
       BM_UFlat/14                            45476     45260  805.8MB/s  sum                   +0.5%
       BM_UFlat/15                             4985      5003  805.7MB/s  man                   -0.4%
       BM_UFlat/16                            80813     77494  1.4GB/s  pb                      +4.3%
       BM_UFlat/17                           251792    241553  727.7MB/s  gaviota               +4.2%
       BM_UValidate/0                         40343     40354  2.4GB/s  html                    -0.0%
       BM_UValidate/1                        426890    451574  1.4GB/s  urls                    -5.5%
       BM_UValidate/2                           187       179  661.9GB/s  jpg                   +4.5%
       BM_UValidate/3                         13783     13827  6.4GB/s  pdf                     -0.3%
       BM_UValidate/4                        162393    163335  2.3GB/s  html4                   -0.6%
       BM_UDataBuffer/0                       93756     93302  1046.7MB/s  html                 +0.5%
       BM_UDataBuffer/1                      886714    916292  730.7MB/s  urls                  -3.2%
       BM_UDataBuffer/2                       15861     16401  7.2GB/s  jpg                     -3.3%
       BM_UDataBuffer/3                       38934     39224  2.2GB/s  pdf                     -0.7%
       BM_UDataBuffer/4                      381008    379428  1029.5MB/s  html4                +0.4%
       BM_UCord/0                             92528     91098  1072.0MB/s  html                 +1.6%
       BM_UCord/1                            858421    885287  756.3MB/s  urls                  -3.0%
       BM_UCord/2                             13140     13464  8.8GB/s  jpg                     -2.4%
       BM_UCord/3                             39012     37773  2.3GB/s  pdf                     +3.3%
       BM_UCord/4                            376869    371267  1052.1MB/s  html4                +1.5%
       BM_UCordString/0                       75810     75303  1.3GB/s  html                    +0.7%
       BM_UCordString/1                      735290    753841  888.2MB/s  urls                  -2.5%
       BM_UCordString/2                       11945     13113  9.0GB/s  jpg                     -8.9%
       BM_UCordString/3                       33901     32562  2.7GB/s  pdf                     +4.1%
       BM_UCordString/4                      310985    309390  1.2GB/s  html4                   +0.5%
       BM_UCordValidate/0                     40952     40450  2.4GB/s  html                    +1.2%
       BM_UCordValidate/1                    433842    456531  1.4GB/s  urls                    -5.0%
       BM_UCordValidate/2                      1179      1173  100.8GB/s  jpg                   +0.5%
       BM_UCordValidate/3                     14481     14392  6.1GB/s  pdf                     +0.6%
       BM_UCordValidate/4                    164364    164151  2.3GB/s  html4                   +0.1%
       BM_ZFlat/0                            160610    156601  623.6MB/s  html (22.31 %)        +2.6%
       BM_ZFlat/1                           1995238   1993582  335.9MB/s  urls (47.77 %)        +0.1%
       BM_ZFlat/2                             30133     24983  4.7GB/s  jpg (99.87 %)          +20.6%
       BM_ZFlat/3                             74453     73128  1.2GB/s  pdf (82.07 %)           +1.8%
       BM_ZFlat/4                            647674    633729  616.4MB/s  html4 (22.51 %)       +2.2%
       BM_ZFlat/5                             76259     76090  308.4MB/s  cp (48.12 %)          +0.2%
       BM_ZFlat/6                             31106     31084  342.1MB/s  c (42.40 %)           +0.1%
       BM_ZFlat/7                             10507     10443  339.8MB/s  lsp (48.37 %)         +0.6%
       BM_ZFlat/8                           1811047   1793325  547.6MB/s  xls (41.23 %)         +1.0%
       BM_ZFlat/9                            597903    581793  249.3MB/s  txt1 (57.87 %)        +2.8%
       BM_ZFlat/10                           525320    514522  232.0MB/s  txt2 (61.93 %)        +2.1%
       BM_ZFlat/11                          1596591   1551636  262.3MB/s  txt3 (54.92 %)        +2.9%
       BM_ZFlat/12                          2134523   2094033  219.5MB/s  txt4 (66.22 %)        +1.9%
       BM_ZFlat/13                           593024    587869  832.6MB/s  bin (18.11 %)         +0.9%
       BM_ZFlat/14                           114746    110666  329.5MB/s  sum (48.96 %)         +3.7%
       BM_ZFlat/15                            14376     14485  278.3MB/s  man (59.36 %)         -0.8%
       BM_ZFlat/16                           167908    150070  753.6MB/s  pb (19.64 %)         +11.9%
       BM_ZFlat/17                           460228    442253  397.5MB/s  gaviota (37.72 %)     +4.1%
       BM_ZCord/0                            164896    160241  609.4MB/s  html                  +2.9%
       BM_ZCord/1                           2070239   2043492  327.7MB/s  urls                  +1.3%
       BM_ZCord/2                             54402     47002  2.5GB/s  jpg                    +15.7%
       BM_ZCord/3                             85871     83832  1073.1MB/s  pdf                  +2.4%
       BM_ZCord/4                            664078    648825  602.0MB/s  html4                 +2.4%
       BM_ZDataBuffer/0                      174874    172549  566.0MB/s  html                  +1.3%
       BM_ZDataBuffer/1                     2134410   2139173  313.0MB/s  urls                  -0.2%
       BM_ZDataBuffer/2                       71911     69551  1.7GB/s  jpg                     +3.4%
       BM_ZDataBuffer/3                       98236     99727  902.1MB/s  pdf                   -1.5%
       BM_ZDataBuffer/4                      710776    699104  558.8MB/s  html4                 +1.7%
       Sum of all benchmarks               27358908  27200688                                   +0.6%
    
    
    Sandy Bridge 2.6 GHz:
    
       Benchmark                          Base (ns)  New (ns)                                Improvement
       -------------------------------------------------------------------------------------------------
       BM_UFlat/0                             49356     49018  1.9GB/s  html                    +0.7%
       BM_UFlat/1                            516764    531955  1.2GB/s  urls                    -2.9%
       BM_UFlat/2                              6982      7304  16.2GB/s  jpg                    -4.4%
       BM_UFlat/3                             15285     15598  5.6GB/s  pdf                     -2.0%
       BM_UFlat/4                            206557    206669  1.8GB/s  html4                   -0.1%
       BM_UFlat/5                             13681     13567  1.7GB/s  cp                      +0.8%
       BM_UFlat/6                              6571      6592  1.6GB/s  c                       -0.3%
       BM_UFlat/7                              2008      1994  1.7GB/s  lsp                     +0.7%
       BM_UFlat/8                            775700    773286  1.2GB/s  xls                     +0.3%
       BM_UFlat/9                            165578    164480  881.8MB/s  txt1                  +0.7%
       BM_UFlat/10                           143707    144139  828.2MB/s  txt2                  -0.3%
       BM_UFlat/11                           443026    436281  932.8MB/s  txt3                  +1.5%
       BM_UFlat/12                           603129    595856  771.2MB/s  txt4                  +1.2%
       BM_UFlat/13                           271682    270450  1.8GB/s  bin                     +0.5%
       BM_UFlat/14                            26200     25666  1.4GB/s  sum                     +2.1%
       BM_UFlat/15                             2620      2608  1.5GB/s  man                     +0.5%
       BM_UFlat/16                            48908     47756  2.3GB/s  pb                      +2.4%
       BM_UFlat/17                           174638    170346  1031.9MB/s  gaviota              +2.5%
       BM_UValidate/0                         31922     31898  3.0GB/s  html                    +0.1%
       BM_UValidate/1                        341265    363554  1.8GB/s  urls                    -6.1%
       BM_UValidate/2                           160       151  782.8GB/s  jpg                   +6.0%
       BM_UValidate/3                         10402     10380  8.5GB/s  pdf                     +0.2%
       BM_UValidate/4                        129490    130587  2.9GB/s  html4                   -0.8%
       BM_UDataBuffer/0                       59383     58736  1.6GB/s  html                    +1.1%
       BM_UDataBuffer/1                      619222    637786  1049.8MB/s  urls                 -2.9%
       BM_UDataBuffer/2                       10775     11941  9.9GB/s  jpg                     -9.8%
       BM_UDataBuffer/3                       18002     17930  4.9GB/s  pdf                     +0.4%
       BM_UDataBuffer/4                      259182    259306  1.5GB/s  html4                   -0.0%
       BM_UCord/0                             59379     57814  1.6GB/s  html                    +2.7%
       BM_UCord/1                            598456    615162  1088.4MB/s  urls                 -2.7%
       BM_UCord/2                              8519      8628  13.7GB/s  jpg                    -1.3%
       BM_UCord/3                             18123     17537  5.0GB/s  pdf                     +3.3%
       BM_UCord/4                            252375    252331  1.5GB/s  html4                   +0.0%
       BM_UCordString/0                       49494     49790  1.9GB/s  html                    -0.6%
       BM_UCordString/1                      524659    541803  1.2GB/s  urls                    -3.2%
       BM_UCordString/2                        8206      8354  14.2GB/s  jpg                    -1.8%
       BM_UCordString/3                       17235     16537  5.3GB/s  pdf                     +4.2%
       BM_UCordString/4                      210188    211072  1.8GB/s  html4                   -0.4%
       BM_UCordValidate/0                     31956     31587  3.0GB/s  html                    +1.2%
       BM_UCordValidate/1                    340828    362141  1.8GB/s  urls                    -5.9%
       BM_UCordValidate/2                       783       744  158.9GB/s  jpg                   +5.2%
       BM_UCordValidate/3                     10543     10462  8.4GB/s  pdf                     +0.8%
       BM_UCordValidate/4                    130150    129789  2.9GB/s  html4                   +0.3%
       BM_ZFlat/0                            113873    111200  878.2MB/s  html (22.31 %)        +2.4%
       BM_ZFlat/1                           1473023   1489858  449.4MB/s  urls (47.77 %)        -1.1%
       BM_ZFlat/2                             23569     19486  6.1GB/s  jpg (99.87 %)          +21.0%
       BM_ZFlat/3                             49178     48046  1.8GB/s  pdf (82.07 %)           +2.4%
       BM_ZFlat/4                            475063    469394  832.2MB/s  html4 (22.51 %)       +1.2%
       BM_ZFlat/5                             46910     46816  501.2MB/s  cp (48.12 %)          +0.2%
       BM_ZFlat/6                             16883     16916  628.6MB/s  c (42.40 %)           -0.2%
       BM_ZFlat/7                              5381      5447  651.5MB/s  lsp (48.37 %)         -1.2%
       BM_ZFlat/8                           1466870   1473861  666.3MB/s  xls (41.23 %)         -0.5%
       BM_ZFlat/9                            468006    464101  312.5MB/s  txt1 (57.87 %)        +0.8%
       BM_ZFlat/10                           408157    408957  291.9MB/s  txt2 (61.93 %)        -0.2%
       BM_ZFlat/11                          1253348   1232910  330.1MB/s  txt3 (54.92 %)        +1.7%
       BM_ZFlat/12                          1702373   1702977  269.8MB/s  txt4 (66.22 %)        -0.0%
       BM_ZFlat/13                           439792    438557  1116.0MB/s  bin (18.11 %)        +0.3%
       BM_ZFlat/14                            80766     78851  462.5MB/s  sum (48.96 %)         +2.4%
       BM_ZFlat/15                             7420      7542  534.5MB/s  man (59.36 %)         -1.6%
       BM_ZFlat/16                           112043    100126  1.1GB/s  pb (19.64 %)           +11.9%
       BM_ZFlat/17                           368877    357703  491.4MB/s  gaviota (37.72 %)     +3.1%
       BM_ZCord/0                            116402    113564  859.9MB/s  html                  +2.5%
       BM_ZCord/1                           1507156   1519911  440.5MB/s  urls                  -0.8%
       BM_ZCord/2                             39860     33686  3.5GB/s  jpg                    +18.3%
       BM_ZCord/3                             56211     54694  1.6GB/s  pdf                     +2.8%
       BM_ZCord/4                            485594    479212  815.1MB/s  html4                 +1.3%
       BM_ZDataBuffer/0                      123185    121572  803.3MB/s  html                  +1.3%
       BM_ZDataBuffer/1                     1569111   1589380  421.3MB/s  urls                  -1.3%
       BM_ZDataBuffer/2                       53143     49556  2.4GB/s  jpg                     +7.2%
       BM_ZDataBuffer/3                       65725     66826  1.3GB/s  pdf                     -1.6%
       BM_ZDataBuffer/4                      517871    514750  758.9MB/s  html4                 +0.6%
       Sum of all benchmarks               20258879  20315484                                   -0.3%
    
    
    AMD Instanbul 2.4 GHz:
    
       Benchmark                          Base (ns)  New (ns)                                Improvement
       -------------------------------------------------------------------------------------------------
       BM_UFlat/0                             97120     96585  1011.1MB/s  html                 +0.6%
       BM_UFlat/1                            917473    948016  706.3MB/s  urls                  -3.2%
       BM_UFlat/2                             21496     23938  4.9GB/s  jpg                    -10.2%
       BM_UFlat/3                             44751     45639  1.9GB/s  pdf                     -1.9%
       BM_UFlat/4                            391950    391413  998.0MB/s  html4                 +0.1%
       BM_UFlat/5                             37366     37201  630.7MB/s  cp                    +0.4%
       BM_UFlat/6                             18350     18318  580.5MB/s  c                     +0.2%
       BM_UFlat/7                              5672      5661  626.9MB/s  lsp                   +0.2%
       BM_UFlat/8                           1533390   1529441  642.1MB/s  xls                   +0.3%
       BM_UFlat/9                            335477    336553  431.0MB/s  txt1                  -0.3%
       BM_UFlat/10                           285140    292080  408.7MB/s  txt2                  -2.4%
       BM_UFlat/11                           888507    894758  454.9MB/s  txt3                  -0.7%
       BM_UFlat/12                          1187643   1210928  379.5MB/s  txt4                  -1.9%
       BM_UFlat/13                           493717    507447  964.5MB/s  bin                   -2.7%
       BM_UFlat/14                            61740     60870  599.1MB/s  sum                   +1.4%
       BM_UFlat/15                             7211      7187  560.9MB/s  man                   +0.3%
       BM_UFlat/16                            97435     93100  1.2GB/s  pb                      +4.7%
       BM_UFlat/17                           362662    356395  493.2MB/s  gaviota               +1.8%
       BM_UValidate/0                         47475     47118  2.0GB/s  html                    +0.8%
       BM_UValidate/1                        501304    529741  1.2GB/s  urls                    -5.4%
       BM_UValidate/2                           276       243  486.2GB/s  jpg                  +13.6%
       BM_UValidate/3                         16361     16261  5.4GB/s  pdf                     +0.6%
       BM_UValidate/4                        190741    190353  2.0GB/s  html4                   +0.2%
       BM_UDataBuffer/0                      111080    109771  889.6MB/s  html                  +1.2%
       BM_UDataBuffer/1                     1051035   1085999  616.5MB/s  urls                  -3.2%
       BM_UDataBuffer/2                       25801     25463  4.6GB/s  jpg                     +1.3%
       BM_UDataBuffer/3                       50493     49946  1.8GB/s  pdf                     +1.1%
       BM_UDataBuffer/4                      447258    444138  879.5MB/s  html4                 +0.7%
       BM_UCord/0                            109350    107909  905.0MB/s  html                  +1.3%
       BM_UCord/1                           1023396   1054964  634.7MB/s  urls                  -3.0%
       BM_UCord/2                             25292     24371  4.9GB/s  jpg                     +3.8%
       BM_UCord/3                             48955     49736  1.8GB/s  pdf                     -1.6%
       BM_UCord/4                            440452    437331  893.2MB/s  html4                 +0.7%
       BM_UCordString/0                       98511     98031  996.2MB/s  html                  +0.5%
       BM_UCordString/1                      933230    963495  694.9MB/s  urls                  -3.1%
       BM_UCordString/2                       23311     24076  4.9GB/s  jpg                     -3.2%
       BM_UCordString/3                       45568     46196  1.9GB/s  pdf                     -1.4%
       BM_UCordString/4                      397791    396934  984.1MB/s  html4                 +0.2%
       BM_UCordValidate/0                     47537     46921  2.0GB/s  html                    +1.3%
       BM_UCordValidate/1                    505071    532716  1.2GB/s  urls                    -5.2%
       BM_UCordValidate/2                      1663      1621  72.9GB/s  jpg                    +2.6%
       BM_UCordValidate/3                     16890     16926  5.2GB/s  pdf                     -0.2%
       BM_UCordValidate/4                    192365    191984  2.0GB/s  html4                   +0.2%
       BM_ZFlat/0                            184708    179103  545.3MB/s  html (22.31 %)        +3.1%
       BM_ZFlat/1                           2293864   2302950  290.7MB/s  urls (47.77 %)        -0.4%
       BM_ZFlat/2                             52852     47618  2.5GB/s  jpg (99.87 %)          +11.0%
       BM_ZFlat/3                            100766     96179  935.3MB/s  pdf (82.07 %)         +4.8%
       BM_ZFlat/4                            741220    727977  536.6MB/s  html4 (22.51 %)       +1.8%
       BM_ZFlat/5                             85402     85418  274.7MB/s  cp (48.12 %)          -0.0%
       BM_ZFlat/6                             36558     36494  291.4MB/s  c (42.40 %)           +0.2%
       BM_ZFlat/7                             12706     12507  283.7MB/s  lsp (48.37 %)         +1.6%
       BM_ZFlat/8                           2336823   2335688  420.5MB/s  xls (41.23 %)         +0.0%
       BM_ZFlat/9                            701804    681153  212.9MB/s  txt1 (57.87 %)        +3.0%
       BM_ZFlat/10                           606700    597194  199.9MB/s  txt2 (61.93 %)        +1.6%
       BM_ZFlat/11                          1852283   1803238  225.7MB/s  txt3 (54.92 %)        +2.7%
       BM_ZFlat/12                          2475527   2443354  188.1MB/s  txt4 (66.22 %)        +1.3%
       BM_ZFlat/13                           694497    696654  702.6MB/s  bin (18.11 %)         -0.3%
       BM_ZFlat/14                           136929    129855  280.8MB/s  sum (48.96 %)         +5.4%
       BM_ZFlat/15                            17172     17124  235.4MB/s  man (59.36 %)         +0.3%
       BM_ZFlat/16                           190364    171763  658.4MB/s  pb (19.64 %)         +10.8%
       BM_ZFlat/17                           567285    555190  316.6MB/s  gaviota (37.72 %)     +2.2%
       BM_ZCord/0                            193490    187031  522.1MB/s  html                  +3.5%
       BM_ZCord/1                           2427537   2415315  277.2MB/s  urls                  +0.5%
       BM_ZCord/2                             85378     81412  1.5GB/s  jpg                     +4.9%
       BM_ZCord/3                            121898    119419  753.3MB/s  pdf                   +2.1%
       BM_ZCord/4                            779564    762961  512.0MB/s  html4                 +2.2%
       BM_ZDataBuffer/0                      213820    207272  471.1MB/s  html                  +3.2%
       BM_ZDataBuffer/1                     2589010   2586495  258.9MB/s  urls                  +0.1%
       BM_ZDataBuffer/2                      121871    118885  1018.4MB/s  jpg                  +2.5%
       BM_ZDataBuffer/3                      145382    145986  616.2MB/s  pdf                   -0.4%
       BM_ZDataBuffer/4                      868117    852754  458.1MB/s  html4                 +1.8%
       Sum of all benchmarks               33771833  33744763                                   +0.1%
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@71 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 81f34784b7b812dcda956ee489dfdc74ec2da990
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Sun Jan 6 19:21:26 2013 +0000

    Adjust the Snappy open-source distribution for the changes in Google's
    internal file API.
    
    R=sanjay
    
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@70 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 698af469b47fe809905e2ed173ad84241de5800f
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Jan 4 11:54:20 2013 +0000

    Change a few ORs to additions where they don't matter. This helps the compiler
    use the LEA instruction more efficiently, since e.g. a + (b << 2) can be encoded
    as one instruction. Even more importantly, it can constant-fold the
    COPY_* enums together with the shifted negative constants, which also saves
    some instructions. (We don't need it for LITERAL, since it happens to be 0.)
    
    I am unsure why the compiler couldn't do this itself, but the theory is that
    it cannot prove that len-1 and len-4 cannot underflow/wrap, and thus can't
    do the optimization safely.
    
    The gains are small but measurable; 0.5-1.0% over the BM_Z* benchmarks
    (measured on Westmere, Sandy Bridge and Istanbul).
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@69 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 55209f9b92efd97e0a61be28ed94210de04c3bfc
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Mon Oct 8 11:37:16 2012 +0000

    Stop giving -Werror to automake, due to an incompatibility between current
    versions of libtool and automake on non-GNU platforms (e.g. Mac OS X).
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@68 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit b86e81c8b3426a62d8ab3a7674c2506e9e678740
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Aug 17 13:54:47 2012 +0000

    Fix public issue 66: Document GetUncompressedLength better, in particular that
    it leaves the source in a state that's not appropriate for RawUncompress.
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@67 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 2e225ba821b420ae28e1d427075d5589c1e892d9
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue Jul 31 11:44:44 2012 +0000

    Fix public issue 64: Check for <sys/time.h> at configure time,
    since MSVC seemingly does not have it.
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@66 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit e89f20ab46ee11050760c6d57f05c2a3825a911c
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Jul 4 09:34:48 2012 +0000

    Handle the case where gettimeofday() goes backwards or returns the same value
    twice; it could cause division by zero in the unit test framework.
    (We already had one fix for this in place, but it was incomplete.)
    
    This could in theory happen on any system, since there are few guarantees
    about gettimeofday(), but seems to only happen in practice on GNU/Hurd, where
    gettimeofday() is cached and only updated ever so often.
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@65 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 3ec60ac9878de5d0317ad38fc545080a4bfaa74f
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Jul 4 09:28:33 2012 +0000

    Mark ARMv4 as not supporting unaligned accesses (not just ARMv5 and ARMv6);
    apparently Debian still targets these by default, giving us segfaults on
    armel.
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@64 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit be80d6f74f9d82220e952a54f3f129aae1f13f95
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue May 22 09:46:05 2012 +0000

    Fix public bug #62: Remove an extraneous comma at the end of an enum list,
    causing compile errors when embedded in Mozilla on OpenBSD.
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@63 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 8b95464146dddab1c7068f879162db9a885cdafe
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue May 22 09:32:50 2012 +0000

    Snappy library no longer depends on iostream.
    
    Achieved by moving logging macro definitions to a test-only
    header file, and by changing non-test code to use assert,
    fprintf, and abort instead of LOG/CHECK macros.
    
    R=sesse
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@62 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit fc723b212d6972af7051261754770b3f70a7dc03
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Feb 24 15:46:37 2012 +0000

    Release Snappy 1.0.5.
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@61 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit dc63e0ad9693e13390ba31b00d92ecccaf7605c3
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Thu Feb 23 17:00:36 2012 +0000

    For 32-bit platforms, do not try to accelerate multiple neighboring
    32-bit loads with a 64-bit load during compression (it's not a win).
    
    The main target for this optimization is ARM, but 32-bit x86 gets
    a small gain, too, although there is noise in the microbenchmarks.
    It's a no-op for 64-bit x86. It does not affect decompression.
    
    Microbenchmark results on a Cortex-A9 1GHz, using g++ 4.6.2 (from
    Ubuntu/Linaro), -O2 -DNDEBUG -Wa,-march=armv7a -mtune=cortex-a9
    -mthumb-interwork, minimum 1000 iterations:
    
      Benchmark            Time(ns)    CPU(ns) Iterations
      ---------------------------------------------------
      BM_ZFlat/0            1158277    1160000       1000 84.2MB/s  html (23.57 %)    [ +4.3%]
      BM_ZFlat/1           14861782   14860000       1000 45.1MB/s  urls (50.89 %)    [ +1.1%]
      BM_ZFlat/2             393595     390000       1000 310.5MB/s  jpg (99.88 %)    [ +0.0%]
      BM_ZFlat/3             650583     650000       1000 138.4MB/s  pdf (82.13 %)    [ +3.1%]
      BM_ZFlat/4            4661480    4660000       1000 83.8MB/s  html4 (23.55 %)   [ +4.3%]
      BM_ZFlat/5             491973     490000       1000 47.9MB/s  cp (48.12 %)      [ +2.0%]
      BM_ZFlat/6             193575     192678       1038 55.2MB/s  c (42.40 %)       [ +9.0%]
      BM_ZFlat/7              62343      62754       3187 56.5MB/s  lsp (48.37 %)     [ +2.6%]
      BM_ZFlat/8           17708468   17710000       1000 55.5MB/s  xls (41.34 %)     [ -0.3%]
      BM_ZFlat/9            3755345    3760000       1000 38.6MB/s  txt1 (59.81 %)    [ +8.2%]
      BM_ZFlat/10           3324217    3320000       1000 36.0MB/s  txt2 (64.07 %)    [ +4.2%]
      BM_ZFlat/11          10139932   10140000       1000 40.1MB/s  txt3 (57.11 %)    [ +6.4%]
      BM_ZFlat/12          13532109   13530000       1000 34.0MB/s  txt4 (68.35 %)    [ +5.0%]
      BM_ZFlat/13           4690847    4690000       1000 104.4MB/s  bin (18.21 %)    [ +4.1%]
      BM_ZFlat/14            830682     830000       1000 43.9MB/s  sum (51.88 %)     [ +1.2%]
      BM_ZFlat/15             84784      85011       2235 47.4MB/s  man (59.36 %)     [ +1.1%]
      BM_ZFlat/16           1293254    1290000       1000 87.7MB/s  pb (23.15 %)      [ +2.3%]
      BM_ZFlat/17           2775155    2780000       1000 63.2MB/s  gaviota (38.27 %) [+12.2%]
    
    Core i7 in 32-bit mode (only one run and 100 iterations, though, so noisy):
    
      Benchmark            Time(ns)    CPU(ns) Iterations
      ---------------------------------------------------
      BM_ZFlat/0             227582     223464       3043 437.0MB/s  html (23.57 %)    [ +7.4%]
      BM_ZFlat/1            2982430    2918455        233 229.4MB/s  urls (50.89 %)    [ +2.9%]
      BM_ZFlat/2              46967      46658      15217 2.5GB/s  jpg (99.88 %)       [ +0.0%]
      BM_ZFlat/3             115298     114864       5833 783.2MB/s  pdf (82.13 %)     [ +1.5%]
      BM_ZFlat/4             913440     899743        778 434.2MB/s  html4 (23.55 %)   [ +0.3%]
      BM_ZFlat/5             110302     108571       7000 216.1MB/s  cp (48.12 %)      [ +0.0%]
      BM_ZFlat/6              44409      43372      15909 245.2MB/s  c (42.40 %)       [ +0.8%]
      BM_ZFlat/7              15713      15643      46667 226.9MB/s  lsp (48.37 %)     [ +2.7%]
      BM_ZFlat/8            2625539    2602230        269 377.4MB/s  xls (41.34 %)     [ +1.4%]
      BM_ZFlat/9             808884     811429        875 178.8MB/s  txt1 (59.81 %)    [ -3.9%]
      BM_ZFlat/10            709532     700000       1000 170.5MB/s  txt2 (64.07 %)    [ +0.0%]
      BM_ZFlat/11           2177682    2162162        333 188.2MB/s  txt3 (57.11 %)    [ -1.4%]
      BM_ZFlat/12           2849640    2840000        250 161.8MB/s  txt4 (68.35 %)    [ -1.4%]
      BM_ZFlat/13            849760     835476        778 585.8MB/s  bin (18.21 %)     [ +1.2%]
      BM_ZFlat/14            165940     164571       4375 221.6MB/s  sum (51.88 %)     [ +1.4%]
      BM_ZFlat/15             20939      20571      35000 196.0MB/s  man (59.36 %)     [ +2.1%]
      BM_ZFlat/16            239209     236544       2917 478.1MB/s  pb (23.15 %)      [ +4.2%]
      BM_ZFlat/17            616206     610000       1000 288.2MB/s  gaviota (38.27 %) [ -1.6%]
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@60 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit f8829ea39d51432ba4e6a26ddaec57acea779f4c
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue Feb 21 17:02:17 2012 +0000

    Enable the use of unaligned loads and stores for ARM-based architectures
    where they are available (ARMv7 and higher). This gives a significant
    speed boost on ARM, both for compression and decompression.
    It should not affect x86 at all.
    
    There are more changes possible to speed up ARM, but it might not be
    that easy to do without hurting x86 or making the code uglier.
    Also, we de not try to use NEON yet.
    
    Microbenchmark results on a Cortex-A9 1GHz, using g++ 4.6.2 (from Ubuntu/Linaro),
    -O2 -DNDEBUG -Wa,-march=armv7a -mtune=cortex-a9 -mthumb-interwork:
    
    Benchmark            Time(ns)    CPU(ns) Iterations
    ---------------------------------------------------
    BM_UFlat/0             524806     529100        378 184.6MB/s  html            [+33.6%]
    BM_UFlat/1            5139790    5200000        100 128.8MB/s  urls            [+28.8%]
    BM_UFlat/2              86540      84166       1901 1.4GB/s  jpg               [ +0.6%]
    BM_UFlat/3             215351     210176        904 428.0MB/s  pdf             [+29.8%]
    BM_UFlat/4            2144490    2100000        100 186.0MB/s  html4           [+33.3%]
    BM_UFlat/5             194482     190000       1000 123.5MB/s  cp              [+36.2%]
    BM_UFlat/6              91843      90175       2107 117.9MB/s  c               [+38.6%]
    BM_UFlat/7              28535      28426       6684 124.8MB/s  lsp             [+34.7%]
    BM_UFlat/8            9206600    9200000        100 106.7MB/s  xls             [+42.4%]
    BM_UFlat/9            1865273    1886792        106 76.9MB/s  txt1             [+32.5%]
    BM_UFlat/10           1576809    1587301        126 75.2MB/s  txt2             [+32.3%]
    BM_UFlat/11           4968450    4900000        100 83.1MB/s  txt3             [+32.7%]
    BM_UFlat/12           6673970    6700000        100 68.6MB/s  txt4             [+32.8%]
    BM_UFlat/13           2391470    2400000        100 203.9MB/s  bin             [+29.2%]
    BM_UFlat/14            334601     344827        522 105.8MB/s  sum             [+30.6%]
    BM_UFlat/15             37404      38080       5252 105.9MB/s  man             [+33.8%]
    BM_UFlat/16            535470     540540        370 209.2MB/s  pb              [+31.2%]
    BM_UFlat/17           1875245    1886792        106 93.2MB/s  gaviota          [+37.8%]
    BM_UValidate/0         178425     179533       1114 543.9MB/s  html            [ +2.7%]
    BM_UValidate/1        2100450    2000000        100 334.8MB/s  urls            [ +5.0%]
    BM_UValidate/2           1039       1044     172413 113.3GB/s  jpg             [ +3.4%]
    BM_UValidate/3          59423      59470       3363 1.5GB/s  pdf               [ +7.8%]
    BM_UValidate/4         760716     766283        261 509.8MB/s  html4           [ +6.5%]
    BM_ZFlat/0            1204632    1204819        166 81.1MB/s  html (23.57 %)   [+32.8%]
    BM_ZFlat/1           15656190   15600000        100 42.9MB/s  urls (50.89 %)   [+27.6%]
    BM_ZFlat/2             403336     410677        487 294.8MB/s  jpg (99.88 %)   [+16.5%]
    BM_ZFlat/3             664073     671140        298 134.0MB/s  pdf (82.13 %)   [+28.4%]
    BM_ZFlat/4            4961940    4900000        100 79.7MB/s  html4 (23.55 %)  [+30.6%]
    BM_ZFlat/5             500664     501253        399 46.8MB/s  cp (48.12 %)     [+33.4%]
    BM_ZFlat/6             217276     215982        926 49.2MB/s  c (42.40 %)      [+25.0%]
    BM_ZFlat/7              64122      65487       3054 54.2MB/s  lsp (48.37 %)    [+36.1%]
    BM_ZFlat/8           18045730   18000000        100 54.6MB/s  xls (41.34 %)    [+34.4%]
    BM_ZFlat/9            4051530    4000000        100 36.3MB/s  txt1 (59.81 %)   [+25.0%]
    BM_ZFlat/10           3451800    3500000        100 34.1MB/s  txt2 (64.07 %)   [+25.7%]
    BM_ZFlat/11          11052340   11100000        100 36.7MB/s  txt3 (57.11 %)   [+24.3%]
    BM_ZFlat/12          14538690   14600000        100 31.5MB/s  txt4 (68.35 %)   [+24.7%]
    BM_ZFlat/13           5041850    5000000        100 97.9MB/s  bin (18.21 %)    [+32.0%]
    BM_ZFlat/14            908840     909090        220 40.1MB/s  sum (51.88 %)    [+22.2%]
    BM_ZFlat/15             86921      86206       1972 46.8MB/s  man (59.36 %)    [+42.2%]
    BM_ZFlat/16           1312315    1315789        152 86.0MB/s  pb (23.15 %)     [+34.5%]
    BM_ZFlat/17           3173120    3200000        100 54.9MB/s  gaviota (38.27%) [+28.1%]
    
    
    The move from 64-bit to 32-bit operations for the copies also affected 32-bit x86;
    positive on the decompression side, and slightly negative on the compression side
    (unless that is noise; I only ran once):
    
    Benchmark              Time(ns)    CPU(ns) Iterations
    -----------------------------------------------------
    BM_UFlat/0                86279      86140       7778 1.1GB/s  html             [ +7.5%]
    BM_UFlat/1               839265     822622        778 813.9MB/s  urls           [ +9.4%]
    BM_UFlat/2                 9180       9143      87500 12.9GB/s  jpg             [ +1.2%]
    BM_UFlat/3                35080      35000      20000 2.5GB/s  pdf              [+10.1%]
    BM_UFlat/4               350318     345000       2000 1.1GB/s  html4            [ +7.0%]
    BM_UFlat/5                33808      33472      21212 701.0MB/s  cp             [ +9.0%]
    BM_UFlat/6                15201      15214      46667 698.9MB/s  c              [+14.9%]
    BM_UFlat/7                 4652       4651     159091 762.9MB/s  lsp            [ +7.5%]
    BM_UFlat/8              1285551    1282528        538 765.7MB/s  xls            [+10.7%]
    BM_UFlat/9               282510     281690       2414 514.9MB/s  txt1           [+13.6%]
    BM_UFlat/10              243494     239286       2800 498.9MB/s  txt2           [+14.4%]
    BM_UFlat/11              743625     740000       1000 550.0MB/s  txt3           [+14.3%]
    BM_UFlat/12              999441     989717        778 464.3MB/s  txt4           [+16.1%]
    BM_UFlat/13              412402     410076       1707 1.2GB/s  bin              [ +7.3%]
    BM_UFlat/14               54876      54000      10000 675.3MB/s  sum            [+13.0%]
    BM_UFlat/15                6146       6100     100000 660.8MB/s  man            [+14.8%]
    BM_UFlat/16               90496      90286       8750 1.2GB/s  pb               [ +4.0%]
    BM_UFlat/17              292650     292000       2500 602.0MB/s  gaviota        [+18.1%]
    BM_UValidate/0            49620      49699      14286 1.9GB/s  html             [ +0.0%]
    BM_UValidate/1           501371     500000       1000 1.3GB/s  urls             [ +0.0%]
    BM_UValidate/2              232        227    3043478 521.5GB/s  jpg            [ +1.3%]
    BM_UValidate/3            17250      17143      43750 5.1GB/s  pdf              [ -1.3%]
    BM_UValidate/4           198643     200000       3500 1.9GB/s  html4            [ -0.9%]
    BM_ZFlat/0               227128     229415       3182 425.7MB/s  html (23.57 %) [ -1.4%]
    BM_ZFlat/1              2970089    2960000        250 226.2MB/s  urls (50.89 %) [ -1.9%]
    BM_ZFlat/2                45683      44999      15556 2.6GB/s  jpg (99.88 %)    [ +2.2%]
    BM_ZFlat/3               114661     113136       6364 795.1MB/s  pdf (82.13 %)  [ -1.5%]
    BM_ZFlat/4               919702     914286        875 427.2MB/s  html4 (23.55%) [ -1.3%]
    BM_ZFlat/5               108189     108422       6364 216.4MB/s  cp (48.12 %)   [ -1.2%]
    BM_ZFlat/6                44525      44000      15909 241.7MB/s  c (42.40 %)    [ -2.9%]
    BM_ZFlat/7                15973      15857      46667 223.8MB/s  lsp (48.37 %)  [ +0.0%]
    BM_ZFlat/8              2677888    2639405        269 372.1MB/s  xls (41.34 %)  [ -1.4%]
    BM_ZFlat/9               800715     780000       1000 186.0MB/s  txt1 (59.81 %) [ -0.4%]
    BM_ZFlat/10              700089     700000       1000 170.5MB/s  txt2 (64.07 %) [ -2.9%]
    BM_ZFlat/11             2159356    2138365        318 190.3MB/s  txt3 (57.11 %) [ -0.3%]
    BM_ZFlat/12             2796143    2779923        259 165.3MB/s  txt4 (68.35 %) [ -1.4%]
    BM_ZFlat/13              856458     835476        778 585.8MB/s  bin (18.21 %)  [ -0.1%]
    BM_ZFlat/14              166908     166857       4375 218.6MB/s  sum (51.88 %)  [ -1.4%]
    BM_ZFlat/15               21181      20857      35000 193.3MB/s  man (59.36 %)  [ -0.8%]
    BM_ZFlat/16              244009     239973       2917 471.3MB/s  pb (23.15 %)   [ -1.4%]
    BM_ZFlat/17              596362     590000       1000 297.9MB/s  gaviota (38.27%) [ +0.0%]
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@59 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit f2e184f638bdc7905f26c24faaf10fc0f5d33403
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Sat Feb 11 22:11:22 2012 +0000

    Lower the size allocated in the "corrupted input" unit test from 256 MB
    to 2 MB. This fixes issues with running the unit test on platforms with
    little RAM (e.g. some ARM boards).
    
    Also, reactivate the 2 MB test for 64-bit platforms; there's no good
    reason why it shouldn't be.
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@58 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit e750dc0f054ba74b0ce76dd2013e6728cc7a41c5
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Sun Jan 8 17:55:48 2012 +0000

    Minor refactoring to accomodate changes in Google's internal code tree.
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@57 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit d9068ee301bdf893a4d8cb7c6518eacc44c4c1f2
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Jan 4 13:10:46 2012 +0000

    Fix public issue r57: Fix most warnings with -Wall, mostly signed/unsigned
    warnings. There are still some in the unit test, but the main .cc file should
    be clean. We haven't enabled -Wall for the default build, since the unit test
    is still not clean.
    
    This also fixes a real bug in the open-source implementation of
    ReadFileToStringOrDie(); it would not detect errors correctly.
    
    I had to go through some pains to avoid performance loss as the types
    were changed; I think there might still be some with 32-bit if and only if LFS
    is enabled (ie., size_t is 64-bit), but for regular 32-bit and 64-bit I can't
    see any losses, and I've diffed the generated GCC assembler between the old and
    new code without seeing any significant choices. If anything, it's ever so
    slightly faster.
    
    This may or may not enable compression of very large blocks (>2^32 bytes)
    when size_t is 64-bit, but I haven't checked, and it is still not a supported
    case.
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@56 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 0755c815197dacc77d8971ae917c86d7aa96bf8e
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Jan 4 10:46:39 2012 +0000

    Add a framing format description. We do not have any implementation of this at
    the current point, but there seems to be enough of a general interest in the
    topic (cf. public bug #34).
    
    R=csilvers,sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@55 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit d7eb2dc4133794b62cba691f9be40d1549bc32e2
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Mon Dec 5 21:27:26 2011 +0000

    Speed up decompression by moving the refill check to the end of the loop.
    
    This seems to work because in most of the branches, the compiler can evaluate
    “ip_limit_ - ip” in a more efficient way than reloading ip_limit_ from memory
    (either by already having the entire expression in a register, or reconstructing
    it from “avail”, or something else). Memory loads, even from L1, are seemingly
    costly in the big picture at the current decompression speeds.
    
    Microbenchmarks (64-bit, opt mode):
    
    Westmere (Intel Core i7):
    
      Benchmark     Time(ns)    CPU(ns) Iterations
      --------------------------------------------
      BM_UFlat/0       74492      74491     187894 1.3GB/s  html      [ +5.9%]
      BM_UFlat/1      712268     712263      19644 940.0MB/s  urls    [ +3.8%]
      BM_UFlat/2       10591      10590    1000000 11.2GB/s  jpg      [ -6.8%]
      BM_UFlat/3       29643      29643     469915 3.0GB/s  pdf       [ +7.9%]
      BM_UFlat/4      304669     304667      45930 1.3GB/s  html4     [ +4.8%]
      BM_UFlat/5       28508      28507     490077 823.1MB/s  cp      [ +4.0%]
      BM_UFlat/6       12415      12415    1000000 856.5MB/s  c       [ +8.6%]
      BM_UFlat/7        3415       3415    4084723 1039.0MB/s  lsp    [+18.0%]
      BM_UFlat/8      979569     979563      14261 1002.5MB/s  xls    [ +5.8%]
      BM_UFlat/9      230150     230148      60934 630.2MB/s  txt1    [ +5.2%]
      BM_UFlat/10     197167     197166      71135 605.5MB/s  txt2    [ +4.7%]
      BM_UFlat/11     607394     607390      23041 670.1MB/s  txt3    [ +5.6%]
      BM_UFlat/12     808502     808496      17316 568.4MB/s  txt4    [ +5.0%]
      BM_UFlat/13     372791     372788      37564 1.3GB/s  bin       [ +3.3%]
      BM_UFlat/14      44541      44541     313969 818.8MB/s  sum     [ +5.7%]
      BM_UFlat/15       4833       4833    2898697 834.1MB/s  man     [ +4.8%]
      BM_UFlat/16      79855      79855     175356 1.4GB/s  pb        [ +4.8%]
      BM_UFlat/17     245845     245843      56838 715.0MB/s  gaviota [ +5.8%]
    
    Clovertown (Intel Core 2):
    
      Benchmark     Time(ns)    CPU(ns) Iterations
      --------------------------------------------
      BM_UFlat/0      107911     107890     100000 905.1MB/s  html    [ +2.2%]
      BM_UFlat/1     1011237    1011041      10000 662.3MB/s  urls    [ +2.5%]
      BM_UFlat/2       26775      26770     523089 4.4GB/s  jpg       [ +0.0%]
      BM_UFlat/3       48103      48095     290618 1.8GB/s  pdf       [ +3.4%]
      BM_UFlat/4      437724     437644      31937 892.6MB/s  html4   [ +2.1%]
      BM_UFlat/5       39607      39600     358284 592.5MB/s  cp      [ +2.4%]
      BM_UFlat/6       18227      18224     768191 583.5MB/s  c       [ +2.7%]
      BM_UFlat/7        5171       5170    2709437 686.4MB/s  lsp     [ +3.9%]
      BM_UFlat/8     1560291    1559989       8970 629.5MB/s  xls     [ +3.6%]
      BM_UFlat/9      335401     335343      41731 432.5MB/s  txt1    [ +3.0%]
      BM_UFlat/10     287014     286963      48758 416.0MB/s  txt2    [ +2.8%]
      BM_UFlat/11     888522     888356      15752 458.1MB/s  txt3    [ +2.9%]
      BM_UFlat/12    1186600    1186378      10000 387.3MB/s  txt4    [ +3.1%]
      BM_UFlat/13     572295     572188      24468 855.4MB/s  bin     [ +2.1%]
      BM_UFlat/14      64060      64049     218401 569.4MB/s  sum     [ +4.1%]
      BM_UFlat/15       7264       7263    1916168 555.0MB/s  man     [ +1.4%]
      BM_UFlat/16     108853     108836     100000 1039.1MB/s  pb     [ +1.7%]
      BM_UFlat/17     364289     364223      38419 482.6MB/s  gaviota [ +4.9%]
    
    Barcelona (AMD Opteron):
    
      Benchmark     Time(ns)    CPU(ns) Iterations
      --------------------------------------------
      BM_UFlat/0      103900     103871     100000 940.2MB/s  html    [ +8.3%]
      BM_UFlat/1     1000435    1000107      10000 669.5MB/s  urls    [ +6.6%]
      BM_UFlat/2       24659      24652     567362 4.8GB/s  jpg       [ +0.1%]
      BM_UFlat/3       48206      48193     291121 1.8GB/s  pdf       [ +5.0%]
      BM_UFlat/4      421980     421850      33174 926.0MB/s  html4   [ +7.3%]
      BM_UFlat/5       40368      40357     346994 581.4MB/s  cp      [ +8.7%]
      BM_UFlat/6       19836      19830     708695 536.2MB/s  c       [ +8.0%]
      BM_UFlat/7        6100       6098    2292774 581.9MB/s  lsp     [ +9.0%]
      BM_UFlat/8     1693093    1692514       8261 580.2MB/s  xls     [ +8.0%]
      BM_UFlat/9      365991     365886      38225 396.4MB/s  txt1    [ +7.1%]
      BM_UFlat/10     311330     311238      44950 383.6MB/s  txt2    [ +7.6%]
      BM_UFlat/11     975037     974737      14376 417.5MB/s  txt3    [ +6.9%]
      BM_UFlat/12    1303558    1303175      10000 352.6MB/s  txt4    [ +7.3%]
      BM_UFlat/13     517448     517290      27144 946.2MB/s  bin     [ +5.5%]
      BM_UFlat/14      66537      66518     210352 548.3MB/s  sum     [ +7.5%]
      BM_UFlat/15       7976       7974    1760383 505.6MB/s  man     [ +5.6%]
      BM_UFlat/16     103121     103092     100000 1097.0MB/s  pb     [ +8.7%]
      BM_UFlat/17     391431     391314      35733 449.2MB/s  gaviota [ +6.5%]
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@54 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 5ed51ce15fc4ff8d2f7235704eb6b0c3f762fb88
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Nov 23 11:14:17 2011 +0000

    Speed up decompression by making the fast path for literals faster.
    
    We do the fast-path step as soon as possible; in fact, as soon as we know the
    literal length. Since we usually hit the fast path, we can then skip the checks
    for long literals and available input space (beyond what the fast path check
    already does).
    
    Note that this changes the decompression Writer API; however, it does not
    change the ABI, since writers are always templatized and as such never
    cross compilation units. The new API is slightly more general, in that it
    doesn't hard-code the value 16. Note that we also take care to check
    for len <= 16 first, since the other two checks almost always succeed
    (so we don't want to waste time checking for them until we have to).
    
    The improvements are most marked on Nehalem, but are generally positive
    on other platforms as well. All microbenchmarks are 64-bit, opt.
    
    Clovertown (Core 2):
    
      Benchmark     Time(ns)    CPU(ns) Iterations
      --------------------------------------------
      BM_UFlat/0      110226     110224     100000 886.0MB/s  html    [ +1.5%]
      BM_UFlat/1     1036523    1036508      10000 646.0MB/s  urls    [ -0.8%]
      BM_UFlat/2       26775      26775     522570 4.4GB/s  jpg       [ +0.0%]
      BM_UFlat/3       49738      49737     280974 1.8GB/s  pdf       [ +0.3%]
      BM_UFlat/4      446790     446792      31334 874.3MB/s  html4   [ +0.8%]
      BM_UFlat/5       40561      40562     350424 578.5MB/s  cp      [ +1.3%]
      BM_UFlat/6       18722      18722     746903 568.0MB/s  c       [ +1.4%]
      BM_UFlat/7        5373       5373    2608632 660.5MB/s  lsp     [ +8.3%]
      BM_UFlat/8     1615716    1615718       8670 607.8MB/s  xls     [ +2.0%]
      BM_UFlat/9      345278     345281      40481 420.1MB/s  txt1    [ +1.4%]
      BM_UFlat/10     294855     294855      47452 404.9MB/s  txt2    [ +1.6%]
      BM_UFlat/11     914263     914263      15316 445.2MB/s  txt3    [ +1.1%]
      BM_UFlat/12    1222694    1222691      10000 375.8MB/s  txt4    [ +1.4%]
      BM_UFlat/13     584495     584489      23954 837.4MB/s  bin     [ -0.6%]
      BM_UFlat/14      66662      66662     210123 547.1MB/s  sum     [ +1.2%]
      BM_UFlat/15       7368       7368    1881856 547.1MB/s  man     [ +4.0%]
      BM_UFlat/16     110727     110726     100000 1021.4MB/s  pb     [ +2.3%]
      BM_UFlat/17     382138     382141      36616 460.0MB/s  gaviota [ -0.7%]
    
    Westmere (Core i7):
    
      Benchmark     Time(ns)    CPU(ns) Iterations
      --------------------------------------------
      BM_UFlat/0       78861      78853     177703 1.2GB/s  html      [ +2.1%]
      BM_UFlat/1      739560     739491      18912 905.4MB/s  urls    [ +3.4%]
      BM_UFlat/2        9867       9866    1419014 12.0GB/s  jpg      [ +3.4%]
      BM_UFlat/3       31989      31986     438385 2.7GB/s  pdf       [ +0.2%]
      BM_UFlat/4      319406     319380      43771 1.2GB/s  html4     [ +1.9%]
      BM_UFlat/5       29639      29636     472862 791.7MB/s  cp      [ +5.2%]
      BM_UFlat/6       13478      13477    1000000 789.0MB/s  c       [ +2.3%]
      BM_UFlat/7        4030       4029    3475364 880.7MB/s  lsp     [ +8.7%]
      BM_UFlat/8     1036585    1036492      10000 947.5MB/s  xls     [ +6.9%]
      BM_UFlat/9      242127     242105      57838 599.1MB/s  txt1    [ +3.0%]
      BM_UFlat/10     206499     206480      67595 578.2MB/s  txt2    [ +3.4%]
      BM_UFlat/11     641635     641570      21811 634.4MB/s  txt3    [ +2.4%]
      BM_UFlat/12     848847     848769      16443 541.4MB/s  txt4    [ +3.1%]
      BM_UFlat/13     384968     384938      36366 1.2GB/s  bin       [ +0.3%]
      BM_UFlat/14      47106      47101     297770 774.3MB/s  sum     [ +4.4%]
      BM_UFlat/15       5063       5063    2772202 796.2MB/s  man     [ +7.7%]
      BM_UFlat/16      83663      83656     167697 1.3GB/s  pb        [ +1.8%]
      BM_UFlat/17     260224     260198      53823 675.6MB/s  gaviota [ -0.5%]
    
    Barcelona (Opteron):
    
      Benchmark     Time(ns)    CPU(ns) Iterations
      --------------------------------------------
      BM_UFlat/0      112490     112457     100000 868.4MB/s  html    [ -0.4%]
      BM_UFlat/1     1066719    1066339      10000 627.9MB/s  urls    [ +1.0%]
      BM_UFlat/2       24679      24672     563802 4.8GB/s  jpg       [ +0.7%]
      BM_UFlat/3       50603      50589     277285 1.7GB/s  pdf       [ +2.6%]
      BM_UFlat/4      452982     452849      30900 862.6MB/s  html4   [ -0.2%]
      BM_UFlat/5       43860      43848     319554 535.1MB/s  cp      [ +1.2%]
      BM_UFlat/6       21419      21413     653573 496.6MB/s  c       [ +1.0%]
      BM_UFlat/7        6646       6645    2105405 534.1MB/s  lsp     [ +0.3%]
      BM_UFlat/8     1828487    1827886       7658 537.3MB/s  xls     [ +2.6%]
      BM_UFlat/9      391824     391714      35708 370.3MB/s  txt1    [ +2.2%]
      BM_UFlat/10     334913     334816      41885 356.6MB/s  txt2    [ +1.7%]
      BM_UFlat/11    1042062    1041674      10000 390.7MB/s  txt3    [ +1.1%]
      BM_UFlat/12    1398902    1398456      10000 328.6MB/s  txt4    [ +1.7%]
      BM_UFlat/13     545706     545530      25669 897.2MB/s  bin     [ -0.4%]
      BM_UFlat/14      71512      71505     196035 510.0MB/s  sum     [ +1.4%]
      BM_UFlat/15       8422       8421    1665036 478.7MB/s  man     [ +2.6%]
      BM_UFlat/16     112053     112048     100000 1009.3MB/s  pb     [ -0.4%]
      BM_UFlat/17     416723     416713      33612 421.8MB/s  gaviota [ -2.0%]
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@53 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 0c1b9c3904430f5b399bd057d76de4bc36b7a123
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue Nov 8 14:46:39 2011 +0000

    Fix public issue #53: Update the README to the API we actually open-sourced
    with.
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@52 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit b61134bc0a6a904b41522b4e5c9e80874c730cef
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Oct 5 12:27:12 2011 +0000

    In the format description, use a clearer example to emphasize that varints are
    stored in little-endian. Patch from Christian von Roques.
    
    R=csilvers
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@51 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 21a2e4f55758e759302cd84ad0f3580affcba7d9
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Thu Sep 15 19:34:06 2011 +0000

    Release Snappy 1.0.4.
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@50 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit e2e303286813c759c5b1cdb46dad63c494f0a061
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Thu Sep 15 09:50:05 2011 +0000

    Fix public issue #50: Include generic byteswap macros.
    Also include Solaris 10 and FreeBSD versions.
    
    R=csilvers
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@49 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 593002da3c051f4721312869f816b41485bad3b7
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Aug 10 18:57:27 2011 +0000

    Partially fix public issue 50: Remove an extra comma from the end of some
    enum declarations, as it seems the Sun compiler does not like it.
    
    Based on patch by Travis Vitek.
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@48 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit f1063a5dc43891eed37f0586bfea57b84dddd756
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Aug 10 18:44:16 2011 +0000

    Use the right #ifdef test for sys/mman.h.
    
    Based on patch by Travis Vitek.
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@47 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 41c827a2fa9ce048202d941187f211180feadde4
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Aug 10 01:22:09 2011 +0000

    Fix public issue #47: Small comment cleanups in the unit test.
    
    Originally based on a patch by Patrick Pelletier.
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@46 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 59aeffa6049b5c2a3a467e7602c1f93630b870e7
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Aug 10 01:14:43 2011 +0000

    Fix public issue #46: Format description said "3-byte offset"
    instead of "4-byte offset" for the longest copies.
    
    Also fix an inconsistency in the heading for section 2.2.3.
    Both patches by Patrick Pelletier.
    
    R=csilvers
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@45 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 57e7cd72559cb022ef32856f2252a4c4585e562e
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue Jun 28 11:40:25 2011 +0000

    Fix public issue #44: Make the definition and declaration of CompressFragment
    identical, even regarding cv-qualifiers.
    
    This is required to work around a bug in the Solaris Studio C++ compiler
    (it does not properly disregard cv-qualifiers when doing name mangling).
    
    R=sanjay
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@44 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 13c4a449a8ea22139c9aa441e8024eebc9dbdf6e
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Sat Jun 4 10:19:05 2011 +0000

    Correct an inaccuracy in the Snappy format description.
    (I stumbled into this when changing the way we decompress literals.)
    
    R=csilvers
    
    Revision created by MOE tool push_codebase.
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@43 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit f5406737403119e1483a71d2084d17728663a114
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Jun 3 20:53:06 2011 +0000

    Speed up decompression by removing a fast-path attempt.
    
    Whenever we try to enter a copy fast-path, there is a certain cost in checking
    that all the preconditions are in place, but it's normally offset by the fact
    that we can usually take the cheaper path. However, in a certain path we've
    already established that "avail < literal_length", which usually means that
    either the available space is small, or the literal is big. Both will disqualify
    us from taking the fast path, and thus we take the hit from the precondition
    checking without gaining much from having a fast path. Thus, simply don't try
    the fast path in this situation -- we're already on a slow path anyway
    (one where we need to refill more data from the reader).
    
    I'm a bit surprised at how much this gained; it could be that this path is
    more common than I thought, or that the simpler structure somehow makes the
    compiler happier. I haven't looked at the assembler, but it's a win across
    the board on both Core 2, Core i7 and Opteron, at least for the cases we
    typically care about. The gains seem to be the largest on Core i7, though.
    Results from my Core i7 workstation:
    
    
      Benchmark            Time(ns)    CPU(ns) Iterations
      ---------------------------------------------------
      BM_UFlat/0              73337      73091     190996 1.3GB/s  html      [ +1.7%]
      BM_UFlat/1             696379     693501      20173 965.5MB/s  urls    [ +2.7%]
      BM_UFlat/2               9765       9734    1472135 12.1GB/s  jpg      [ +0.7%]
      BM_UFlat/3              29720      29621     472973 3.0GB/s  pdf       [ +1.8%]
      BM_UFlat/4             294636     293834      47782 1.3GB/s  html4     [ +2.3%]
      BM_UFlat/5              28399      28320     494700 828.5MB/s  cp      [ +3.5%]
      BM_UFlat/6              12795      12760    1000000 833.3MB/s  c       [ +1.2%]
      BM_UFlat/7               3984       3973    3526448 893.2MB/s  lsp     [ +5.7%]
      BM_UFlat/8             991996     989322      14141 992.6MB/s  xls     [ +3.3%]
      BM_UFlat/9             228620     227835      61404 636.6MB/s  txt1    [ +4.0%]
      BM_UFlat/10            197114     196494      72165 607.5MB/s  txt2    [ +3.5%]
      BM_UFlat/11            605240     603437      23217 674.4MB/s  txt3    [ +3.7%]
      BM_UFlat/12            804157     802016      17456 573.0MB/s  txt4    [ +3.9%]
      BM_UFlat/13            347860     346998      40346 1.4GB/s  bin       [ +1.2%]
      BM_UFlat/14             44684      44559     315315 818.4MB/s  sum     [ +2.3%]
      BM_UFlat/15              5120       5106    2739726 789.4MB/s  man     [ +3.3%]
      BM_UFlat/16             76591      76355     183486 1.4GB/s  pb        [ +2.8%]
      BM_UFlat/17            238564     237828      58824 739.1MB/s  gaviota [ +1.6%]
      BM_UValidate/0          42194      42060     333333 2.3GB/s  html      [ -0.1%]
      BM_UValidate/1         433182     432005      32407 1.5GB/s  urls      [ -0.1%]
      BM_UValidate/2            197        196   71428571 603.3GB/s  jpg     [ +0.5%]
      BM_UValidate/3          14494      14462     972222 6.1GB/s  pdf       [ +0.5%]
      BM_UValidate/4         168444     167836      83832 2.3GB/s  html4     [ +0.1%]
    
    R=jeff
    
    Revision created by MOE tool push_codebase.
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@42 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 197f3ee9f9397e98c9abf07f9da875fbcb725dba
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Jun 3 20:47:14 2011 +0000

    Speed up decompression by not needing a lookup table for literal items.
    
    Looking up into and decoding the values from char_table has long shown up as a
    hotspot in the decompressor. While it turns out that it's hard to make a more
    efficient decoder for the copy ops, the literals are simple enough that we can
    decode them without needing a table lookup. (This means that 1/4 of the table
    is now unused, although that in itself doesn't buy us anything.)
    
    The gains are small, but definitely present; some tests win as much as 10%,
    but 1-4% is more typical. These results are from Core i7, in 64-bit mode;
    Core 2 and Opteron show similar results. (I've run with more iterations
    than unusual to make sure the smaller gains don't drown entirely in noise.)
    
      Benchmark            Time(ns)    CPU(ns) Iterations
      ---------------------------------------------------
      BM_UFlat/0              74665      74428     182055 1.3GB/s  html      [ +3.1%]
      BM_UFlat/1             714106     711997      19663 940.4MB/s  urls    [ +4.4%]
      BM_UFlat/2               9820       9789    1427115 12.1GB/s  jpg      [ -1.2%]
      BM_UFlat/3              30461      30380     465116 2.9GB/s  pdf       [ +0.8%]
      BM_UFlat/4             301445     300568      46512 1.3GB/s  html4     [ +2.2%]
      BM_UFlat/5              29338      29263     479452 801.8MB/s  cp      [ +1.6%]
      BM_UFlat/6              13004      12970    1000000 819.9MB/s  c       [ +2.1%]
      BM_UFlat/7               4180       4168    3349282 851.4MB/s  lsp     [ +1.3%]
      BM_UFlat/8            1026149    1024000      10000 959.0MB/s  xls     [+10.7%]
      BM_UFlat/9             237441     236830      59072 612.4MB/s  txt1    [ +0.3%]
      BM_UFlat/10            203966     203298      69307 587.2MB/s  txt2    [ +0.8%]
      BM_UFlat/11            627230     625000      22400 651.2MB/s  txt3    [ +0.7%]
      BM_UFlat/12            836188     833979      16787 551.0MB/s  txt4    [ +1.3%]
      BM_UFlat/13            351904     350750      39886 1.4GB/s  bin       [ +3.8%]
      BM_UFlat/14             45685      45562     308370 800.4MB/s  sum     [ +5.9%]
      BM_UFlat/15              5286       5270    2656546 764.9MB/s  man     [ +1.5%]
      BM_UFlat/16             78774      78544     178117 1.4GB/s  pb        [ +4.3%]
      BM_UFlat/17            242270     241345      58091 728.3MB/s  gaviota [ +1.2%]
      BM_UValidate/0          42149      42000     333333 2.3GB/s  html      [ -3.0%]
      BM_UValidate/1         432741     431303      32483 1.5GB/s  urls      [ +7.8%]
      BM_UValidate/2            198        197   71428571 600.7GB/s  jpg     [+16.8%]
      BM_UValidate/3          14560      14521     965517 6.1GB/s  pdf       [ -4.1%]
      BM_UValidate/4         169065     168671      83832 2.3GB/s  html4     [ -2.9%]
    
    R=jeff
    
    Revision created by MOE tool push_codebase.
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@41 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 8efa2639e885ac467e7b11c662975c5844019fb9
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Thu Jun 2 22:57:41 2011 +0000

    Release Snappy 1.0.3.
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@40 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 2e12124bd87f39296709decc65195fa5bfced538
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Thu Jun 2 18:06:54 2011 +0000

    Remove an unneeded goto in the decompressor; it turns out that the
    state of ip_ after decompression (or attempted decompresion) is
    completely irrelevant, so we don't need the trailer.
    
    Performance is, as expected, mostly flat -- there's a curious ~3-5%
    loss in the "lsp" test, but that test case is so short it is hard to say
    anything definitive about why (most likely, it's some sort of
    unrelated effect).
    
    R=jeff
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@39 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit c266bbf32103f8ed4a83e2272ed3d8828d5b8b34
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Thu Jun 2 17:59:40 2011 +0000

    Speed up decompression by caching ip_.
    
    It is seemingly hard for the compiler to understand that ip_, the current input
    pointer into the compressed data stream, can not alias on anything else, and
    thus using it directly will incur memory traffic as it cannot be kept in a
    register. The code already knew about this and cached it into a local
    variable, but since Step() only decoded one tag, it had to move ip_ back into
    place between every tag. This seems to have cost us a significant amount of
    performance, so changing Step() into a function that decodes as much as it can
    before it saves ip_ back and returns. (Note that Step() was already inlined,
    so it is not the manual inlining that buys the performance here.)
    
    The wins are about 3-6% for Core 2, 6-13% on Core i7 and 5-12% on Opteron
    (for plain array-to-array decompression, in 64-bit opt mode).
    
    There is a tiny difference in the behavior here; if an invalid literal is
    encountered (ie., the writer refuses the Append() operation), ip_ will now
    point to the byte past the tag byte, instead of where the literal was
    originally thought to end. However, we don't use ip_ for anything after
    DecompressAllTags() has returned, so this should not change external behavior
    in any way.
    
    Microbenchmark results for Core i7, 64-bit (Opteron results are similar):
    
    Benchmark            Time(ns)    CPU(ns) Iterations
    ---------------------------------------------------
    BM_UFlat/0              79134      79110       8835 1.2GB/s  html      [ +6.2%]
    BM_UFlat/1             786126     786096        891 851.8MB/s  urls    [+10.0%]
    BM_UFlat/2               9948       9948      69125 11.9GB/s  jpg      [ -1.3%]
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    BM_UFlat/5              31384      31390      22363 747.5MB/s  cp      [ +9.2%]
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    BM_UFlat/8            1203174    1203007        582 816.3MB/s  xls     [+19.3%]
    BM_UFlat/9             253869     253955       2757 571.1MB/s  txt1    [+11.4%]
    BM_UFlat/10            219292     219290       3194 544.4MB/s  txt2    [+12.1%]
    BM_UFlat/11            672135     672131       1000 605.5MB/s  txt3    [+11.2%]
    BM_UFlat/12            902512     902492        776 509.2MB/s  txt4    [+12.5%]
    BM_UFlat/13            372110     371998       1881 1.3GB/s  bin       [ +5.8%]
    BM_UFlat/14             50407      50407      10000 723.5MB/s  sum     [+13.5%]
    BM_UFlat/15              5699       5701     100000 707.2MB/s  man     [+12.4%]
    BM_UFlat/16             83448      83424       8383 1.3GB/s  pb        [ +5.7%]
    BM_UFlat/17            256958     256963       2723 684.1MB/s  gaviota [ +7.9%]
    BM_UValidate/0          42795      42796      16351 2.2GB/s  html      [+25.8%]
    BM_UValidate/1         490672     490622       1427 1.3GB/s  urls      [+22.7%]
    BM_UValidate/2            237        237    2950297 499.0GB/s  jpg     [+24.9%]
    BM_UValidate/3          14610      14611      47901 6.0GB/s  pdf       [+26.8%]
    BM_UValidate/4         171973     171990       4071 2.2GB/s  html4     [+25.7%]
    
    
    
    
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commit d0ee043bc50c62c5b5ff3da044f0b5567257407d
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue May 17 08:48:25 2011 +0000

    Fix the numbering of the headlines in the Snappy format description.
    
    R=csilvers
    DELTA=4  (0 added, 0 deleted, 4 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1906
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@37 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 6c7053871fbdb459c9c14287a138d7f82d6d84a1
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Mon May 16 08:59:18 2011 +0000

    Fix public issue #32: Add compressed format documentation for Snappy.
    This text is new, but an earlier version from Zeev Tarantov was used
    as reference.
    
    R=csilvers
    DELTA=112  (111 added, 0 deleted, 1 changed)
    
    
    Revision created by MOE tool push_codebase.
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    git-svn-id: https://snappy.googlecode.com/svn/trunk@36 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit a1f9f9973d127992f341d442969c86fd9a0847c9
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Mon May 9 21:29:02 2011 +0000

    Fix public issue #39: Pick out the median runs based on CPU time,
    not real time. Also, use nth_element instead of sort, since we
    only need one element.
    
    R=csilvers
    DELTA=5  (3 added, 0 deleted, 2 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1799
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@35 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit f7b105683c074cdf233740089e245e43f63e7e55
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Mon May 9 21:28:45 2011 +0000

    Fix public issue #38: Make the microbenchmark framework handle
    properly cases where gettimeofday() can stand return the same
    result twice (as sometimes on GNU/Hurd) or go backwards
    (as when the user adjusts the clock). We avoid a division-by-zero,
    and put a lower bound on the number of iterations -- the same
    amount as we use to calibrate.
    
    We should probably use CLOCK_MONOTONIC for platforms that support
    it, to be robust against clock adjustments; we already use Windows'
    monotonic timers. However, that's for a later changelist.
    
    R=csilvers
    DELTA=7  (5 added, 0 deleted, 2 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1798
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@34 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit d8d481427a05b88cdb0810c29bf400153595c423
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue May 3 23:22:52 2011 +0000

    Fix public issue #37: Only link snappy_unittest against -lz and other autodetected
    libraries, not libsnappy.so (which doesn't need any such dependency).
    
    R=csilvers
    DELTA=20  (14 added, 0 deleted, 6 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1710
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@33 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit bcecf195c0aeb2c98144d3d54b4d8d228774f50d
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue May 3 23:22:33 2011 +0000

    Release Snappy 1.0.2, to get the license change and various other fixes into
    a release.
    
    R=csilvers
    DELTA=239  (236 added, 0 deleted, 3 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1709
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@32 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 84d9f642025cda672dda0d94a8008f094500aaa6
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue Apr 26 12:34:55 2011 +0000

    Fix public issue #30: Stop using gettimeofday() altogether on Win32,
    as MSVC doesn't include it. Replace with QueryPerformanceCounter(),
    which is monotonic and probably reasonably high-resolution.
    (Some machines have traditionally had bugs in QPC, but they should
    be relatively rare these days, and there's really no much better
    alternative that I know of.)
    
    R=csilvers
    DELTA=74  (55 added, 19 deleted, 0 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1556
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@31 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 3d8e71df8d30f980d71d4c784ebfc5ff62d5b0cb
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Tue Apr 26 12:34:37 2011 +0000

    Fix public issue #31: Don't reset PATH in autogen.sh; instead, do the trickery
    we need for our own build system internally.
    
    R=csilvers
    DELTA=16  (13 added, 1 deleted, 2 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1555
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@30 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 73987351de54c88e2fc3f5dcdeceb47708df3585
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Apr 15 22:55:56 2011 +0000

    When including <windows.h>, define WIN32_LEAN_AND_MEAN first,
    so we won't pull in macro definitions of things like min() and max(),
    which can conflict with <algorithm>.
    
    R=csilvers
    DELTA=1  (1 added, 0 deleted, 0 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1485
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@29 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit fb7e0eade471a20b009720a84fea0af1552791d5
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Mon Apr 11 09:07:01 2011 +0000

    Fix public issue #29: Write CPU timing code for Windows, based on GetProcessTimes()
    instead of getursage().
    
    I thought I'd already committed this patch, so that the 1.0.1 release already
    would have a Windows-compatible snappy_unittest, but I'd seemingly deleted it
    instead, so this is a reconstruction.
    
    R=csilvers
    DELTA=43  (39 added, 3 deleted, 1 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1295
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@28 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit c67fa0c755a329000da5546fff79089d62ac2f82
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Apr 8 09:51:53 2011 +0000

    Include C bindings of Snappy, contributed by Martin Gieseking.
    
    I've made a few changes since Martin's version; mostly style nits, but also
    a semantic change -- most functions that return bool in the C++ version now
    return an enum, to better match typical C (and zlib) semantics.
    
    I've kept the copyright notice, since Martin is obviously the author here;
    he has signed the contributor license agreement, though, so this should not
    hinder Google's use in the future.
    
    We'll need to update the libtool version number to match the added interface,
    but as of http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
    I'm going to wait until public release.
    
    R=csilvers
    DELTA=238  (233 added, 0 deleted, 5 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1294
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@27 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 56be85cb9ae06f2e92180ae2575bdd10c012ab73
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Thu Apr 7 16:36:43 2011 +0000

    Replace geo.protodata with a newer version.
    
    The data compresses/decompresses slightly faster than the old data, and has
    similar density.
    
    R=lookingbill
    DELTA=1  (0 added, 0 deleted, 1 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1288
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@26 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 3dd93f3ec74df54a37f68bffabb058ac757bbe72
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 30 20:27:53 2011 +0000

    Fix public issue #27: Add HAVE_CONFIG_H tests around the config.h
    inclusion in snappy-stubs-internal.h, which eases compiling outside the
    automake/autoconf framework.
    
    R=csilvers
    DELTA=5  (4 added, 1 deleted, 0 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1152
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@25 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit f67bcaa61006da8b325a7ed9909a782590971815
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 30 20:27:39 2011 +0000

    Fix public issue #26: Take memory allocation and reallocation entirely out of the
    Measure() loop. This gives all algorithms a small speed boost, except Snappy which
    already didn't do reallocation (so the measurements were slightly biased in its
    favor).
    
    R=csilvers
    DELTA=92  (69 added, 9 deleted, 14 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1151
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@24 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit cc333c1c5cc4eabceceb9848ff3cac6c604ecbc6
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 30 20:25:09 2011 +0000

    Renamed "namespace zippy" to "namespace snappy" to reduce
    the differences from the opensource code.  Will make it easier
    in the future to mix-and-match third-party code that uses
    snappy with google code.
    
    Currently, csearch shows that the only external user of
    "namespace zippy" is some bigtable code that accesses
    a TEST variable, which is temporarily kept in the zippy
    namespace.
    
    R=sesse
    DELTA=123  (18 added, 3 deleted, 102 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1150
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@23 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit f19fb07e6dc79d6857e37df572dba25ff30fc8f3
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Mon Mar 28 22:17:04 2011 +0000

    Put back the final few lines of what was truncated during the
    license header change.
    
    R=csilvers
    DELTA=5  (4 added, 0 deleted, 1 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1094
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@22 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 7e8ca8f8315fc2ecb4eea19db695039ab2ca43a0
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Sat Mar 26 02:34:34 2011 +0000

    Change on 2011-03-25 19:18:00-07:00 by sesse
    
    	Replace the Apache 2.0 license header by the BSD-type license header;
    	somehow a lot of the files were missed in the last round.
    
    	R=dannyb,csilvers
    	DELTA=147  (74 added, 2 deleted, 71 changed)
    
    Change on 2011-03-25 19:25:07-07:00 by sesse
    
    	Unbreak the build; the relicensing removed a bit too much (only comments
    	were intended, but I also accidentially removed some of the top lines of
    	the actual source).
    
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1072
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@21 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit b4bbc1041b35d844ec26fbae25f2864995361fd8
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Mar 25 16:14:41 2011 +0000

    Change Snappy from the Apache 2.0 to a BSD-type license.
    
    R=dannyb
    DELTA=328  (80 added, 184 deleted, 64 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1061
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@20 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit c47640c510eb11cf8913edfa34f667bceb3a4401
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Mar 25 00:39:01 2011 +0000

    Release Snappy 1.0.1, to soup up all the various small changes
    that have been made since release.
    
    R=csilvers
    DELTA=266  (260 added, 0 deleted, 6 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1057
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@19 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit b1dc1f643eaff897a5ce135f525799b99687b118
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Thu Mar 24 19:15:54 2011 +0000

    Fix a microbenchmark crash on mingw32; seemingly %lld is not universally
    supported on Windows, and %I64d is recommended instead.
    
    R=csilvers
    DELTA=6  (5 added, 0 deleted, 1 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1034
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@18 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 98004ca9afc62a3279dfe9d9a359083f61db437f
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Thu Mar 24 19:15:27 2011 +0000

    Fix public issue #19: Fix unit test when Google Test is installed but the
    gflags package isn't (Google Test is not properly initialized).
    
    Patch by Martin Gieseking.
    
    R=csilvers
    DELTA=2  (1 added, 0 deleted, 1 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1033
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@17 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 444a6c5f72d6f8d8f7213a5bcc08b26606eb9934
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Thu Mar 24 19:13:57 2011 +0000

    Make the unit test work on systems without mmap(). This is required for,
    among others, Windows support. For Windows in specific, we could have used
    CreateFileMapping/MapViewOfFile, but this should at least get us a bit closer
    to compiling, and is of course also relevant for embedded systems with no MMU.
    
    (Part 2/2)
    
    R=csilvers
    DELTA=15  (12 added, 3 deleted, 0 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1032
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@16 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 2e182e9bb840737f9cd8817e859dc17a82f2c16b
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Thu Mar 24 19:12:27 2011 +0000

    Make the unit test work on systems without mmap(). This is required for,
    among others, Windows support. For Windows in specific, we could have used
    CreateFileMapping/MapViewOfFile, but this should at least get us a bit closer
    to compiling, and is of course also relevant for embedded systems with no MMU.
    
    (Part 1/2)
    
    R=csilvers
    DELTA=9  (8 added, 0 deleted, 1 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1031
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@15 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 48662cbb7f81533977334629790d346220084527
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 23 23:17:36 2011 +0000

    Fix public issue #12: Don't keep autogenerated auto* files in Subversion;
    it causes problems with others sending patches etc..
    
    We can't get this 100% hermetic anyhow, due to files like lt~obsolete.m4,
    so we can just as well go cleanly in the other direction.
    
    R=csilvers
    DELTA=21038  (0 added, 21036 deleted, 2 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=1012
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@14 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 9e4717a586149c9538b353400312bab5ab5458c4
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 23 17:50:49 2011 +0000

    Fix public issue tracker bug #3: Call AC_SUBST([LIBTOOL_DEPS]), or the rule
    to rebuild libtool in Makefile.am won't work.
    
    R=csilvers
    DELTA=1  (1 added, 0 deleted, 0 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=997
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@13 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 519c822a34a91a0c0eb32d98e9686ee7d9cd6651
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 23 11:16:39 2011 +0000

    Fix public issue #10: Don't add GTEST_CPPFLAGS to snappy_unittest_CXXFLAGS;
    it's not needed (CPPFLAGS are always included when compiling).
    
    R=csilvers
    DELTA=1  (0 added, 1 deleted, 0 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=994
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@12 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit ea6b936378583cba730c33c8a53776edc1782208
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 23 11:16:18 2011 +0000

    Fix public issue #9: Add -Wall -Werror to automake flags.
    (This concerns automake itself, not the C++ compiler.)
    
    R=csilvers
    DELTA=4  (3 added, 0 deleted, 1 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=993
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@11 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit e3ca06af253094b1c3a8eae508cd97accf077535
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 23 11:13:37 2011 +0000

    Fix a typo in the Snappy README file.
    
    R=csilvers
    DELTA=1  (0 added, 0 deleted, 1 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=992
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@10 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 39d27bea23873abaa663e884261386b17b058f20
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 23 11:13:13 2011 +0000

    Fix public issue #6: Add a --with-gflags for disabling gflags autodetection
    and using a manually given setting (use/don't use) instead.
    
    R=csilvers
    DELTA=16  (13 added, 0 deleted, 3 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=991
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@9 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 60add43d99c1c31aeecd895cb555ad6f6520608e
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 23 11:12:44 2011 +0000

    Fix public issue #5: Replace the EXTRA_LIBSNAPPY_LDFLAGS setup with something
    slightly more standard, that also doesn't leak libtool command-line into
    configure.ac.
    
    R=csilvers
    DELTA=7  (0 added, 4 deleted, 3 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=990
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@8 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit a8dd1700879ad646106742aa0e9c3a48dc07b01d
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 23 11:12:22 2011 +0000

    Fix public issue #4: Properly quote all macro arguments in configure.ac.
    
    R=csilvers
    DELTA=16  (0 added, 0 deleted, 16 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=989
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@7 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 79752dd7033658e28dc894de55012bdf2c9afca3
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 23 11:11:54 2011 +0000

    Fix public issue #7: Don't use internal variables named ac_*, as those belong
    to autoconf's namespace.
    
    R=csilvers
    DELTA=6  (0 added, 0 deleted, 6 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=988
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@6 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 46e39fb20c297129494b969ac4ea64fcd04b4fa0
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 23 11:11:09 2011 +0000

    Add missing licensing headers to a few files. (Part 2/2.)
    
    R=csilvers
    DELTA=12  (12 added, 0 deleted, 0 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=987
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@5 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 3e764216fc8edaafca480443b90e55c14eaae2c2
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 23 11:10:39 2011 +0000

    Add mising licensing headers to a few files. (Part 1/2.)
    
    R=csilvers
    DELTA=24  (24 added, 0 deleted, 0 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=986
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@4 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 9a59f183c8ffec62dcdabd3499d0d515e44e4ef0
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Wed Mar 23 11:10:04 2011 +0000

    Use the correct license file for the Apache 2.0 license;
    spotted by Florian Weimer.
    
    R=csilvers
    DELTA=202  (174 added, 0 deleted, 28 changed)
    
    
    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=985
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@3 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 28a64402392c791905d6e1384ea1b48a5cb0b281
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Mar 18 17:14:15 2011 +0000

    Revision created by MOE tool push_codebase.
    MOE_MIGRATION=
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@2 03e5f5b5-db94-4691-08a0-1a8bf15f6143

commit 7c3c6077b72b4ae2237267a20f640b55e9a90569
Author: [email protected] <[email protected]@03e5f5b5-db94-4691-08a0-1a8bf15f6143>
Date:   Fri Mar 18 17:13:52 2011 +0000

    Create trunk directory.
    
    
    git-svn-id: https://snappy.googlecode.com/svn/trunk@1 03e5f5b5-db94-4691-08a0-1a8bf15f6143