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  1. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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  2. <html>
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  3. <head>
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  4. <title>LuaJIT</title>
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  5. <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
    6. 

  6. <meta name="Author" content="Mike Pall">
    7. 

  7. <meta name="Copyright" content="Copyright (C) 2005-2012, Mike Pall">
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  8. <meta name="Language" content="en">
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  9. <link rel="stylesheet" type="text/css" href="bluequad.css" media="screen">
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  10. <link rel="stylesheet" type="text/css" href="bluequad-print.css" media="print">
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  11. <meta name="description" content="LuaJIT is a Just-In-Time (JIT) compiler for the Lua language.">
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  12. </head>
    13. 

  13. <body>
    14. 

  14. <div id="site">
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  15. <a href="http://luajit.org"><span>Lua<span id="logo">JIT</span></span></a>
    16. 

  16. </div>
    17. 

  17. <div id="head">
    18. 

  18. <h1>LuaJIT</h1>
    19. 

  19. </div>
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  20. <div id="nav">
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  21. <ul><li>
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  22. <a class="current" href="luajit.html">LuaJIT</a>
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  23. <ul><li>
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  24. <a href="install.html">Installation</a>
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  25. </li><li>
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  26. <a href="running.html">Running</a>
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  27. </li></ul>
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  28. </li><li>
    29. 

  29. <a href="extensions.html">Extensions</a>
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  30. <ul><li>
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  31. <a href="ext_ffi.html">FFI Library</a>
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  32. <ul><li>
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  33. <a href="ext_ffi_tutorial.html">FFI Tutorial</a>
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  34. </li><li>
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  35. <a href="ext_ffi_api.html">ffi.* API</a>
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  36. </li><li>
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  37. <a href="ext_ffi_semantics.html">FFI Semantics</a>
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  38. </li></ul>
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  39. </li><li>
    40. 

  40. <a href="ext_jit.html">jit.* Library</a>
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  41. </li><li>
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  42. <a href="ext_c_api.html">Lua/C API</a>
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  43. </li></ul>
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  44. </li><li>
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  45. <a href="status.html">Status</a>
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  46. <ul><li>
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  47. <a href="changes.html">Changes</a>
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  48. </li></ul>
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  49. </li><li>
    50. 

  50. <a href="faq.html">FAQ</a>
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  51. </li><li>
    52. 

  52. <a href="http://luajit.org/performance.html">Performance <span class="ext">&raquo;</span></a>
    53. 

  53. </li><li>
    54. 

  54. <a href="http://luajit.org/download.html">Download <span class="ext">&raquo;</span></a>
    55. 

  55. </li><li>
    56. 

  56. <a href="http://wiki.luajit.org/">Wiki <span class="ext">&raquo;</span></a>
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  57. </li><li>
    58. 

  58. <a href="http://luajit.org/list.html">Mailing List <span class="ext">&raquo;</span></a>
    59. 

  59. </li></ul>
    60. 

  60. </div>
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  61. <div id="main">
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  62. <p>
    63. 

  63. LuaJIT is a <b>Just-In-Time Compiler</b> for the Lua<sup>*</sup>
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  64. programming language.
    65. 

  65. </p>
    66. 

  66. <p>
    67. 

  67. LuaJIT is Copyright &copy; 2005-2012 Mike Pall.
    68. 

  68. LuaJIT is open source software, released under the
    69. 

  69. <a href="http://www.opensource.org/licenses/mit-license.php"><span class="ext">&raquo;</span>&nbsp;MIT license</a>.
    70. 

  70. </p>
    71. 

  71. <p class="indent" style="color: #606060;">
    72. 

  72. * Lua is a powerful, dynamic and light-weight programming language
    73. 

  73. designed for extending applications. Lua is also frequently used as a
    74. 

  74. general-purpose, stand-alone language. More information about
    75. 

  75. Lua can be found at: <a href="http://www.lua.org/"><span class="ext">&raquo;</span>&nbsp;http://www.lua.org/</a>
    76. 

  76. </p>
    77. 

  77. <h2>Compatibility</h2>
    78. 

  78. <p>
    79. 

  79. LuaJIT implements the full set of language features defined by Lua 5.1.
    80. 

  80. The virtual machine (VM) is <b>API- and ABI-compatible</b> to the
    81. 

  81. standard Lua interpreter and can be deployed as a drop-in replacement.
    82. 

  82. </p>
    83. 

  83. <p>
    84. 

  84. LuaJIT offers more performance, at the expense of portability. It
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  85. currently runs on all popular operating systems based on
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  86. <b>x86</b> or <b>x64</b> CPUs (Linux, Windows, OSX etc.) or embedded
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  87. systems based on <b>ARM</b> (Android, iOS), <b>PPC</b> or <b>MIPS</b> CPUs.
    88. 

  88. Other platforms will be supported in the future, based on user demand
    89. 

  89. and sponsoring.
    90. 

  90. </p>
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  91. 

  92. <h2>Overview</h2>
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  93. <p>
    94. 

  94. LuaJIT has been successfully used as a <b>scripting middleware</b> in
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  95. games, 3D modellers, numerical simulations, trading platforms and many
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  96. other specialty applications. It combines high flexibility with high
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  97. performance and an unmatched <b>low memory footprint</b>: less than
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  98. <b>125K</b> for the VM plus less than <b>85K</b> for the JIT compiler (on x86).
    99. 

  99. </p>
    100. 

  100. <p>
    101. 

  101. LuaJIT has been in continuous development since 2005. It's widely
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  102. considered to be <b>one of the fastest dynamic language
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  103. implementations</b>. It has outperformed other dynamic languages on many
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  104. cross-language benchmarks since its first release &mdash; often by a
    105. 

  105. substantial margin. In 2009 other dynamic language VMs started to catch up
    106. 

  106. with the performance of LuaJIT 1.x. Well, I couldn't let that slide. ;-)
    107. 

  107. </p>
    108. 

  108. <p>
    109. 

  109. 2009 also marks the first release of the long-awaited <b>LuaJIT 2.0</b>.
    110. 

  110. The whole VM has been rewritten from the ground up and relentlessly
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  111. optimized for performance. It combines a high-speed interpreter,
    112. 

  112. written in assembler, with a state-of-the-art JIT compiler.
    113. 

  113. </p>
    114. 

  114. <p>
    115. 

  115. An innovative <b>trace compiler</b> is integrated with advanced,
    116. 

  116. SSA-based optimizations and a highly tuned code generation backend. This
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  117. allows a substantial reduction of the overhead associated with dynamic
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  118. language features.
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  119. </p>
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  120. <p>
    121. 

  121. It's destined to break into the <a href="http://luajit.org/performance.html"><span class="ext">&raquo;</span>&nbsp;performance</a>
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  122. range traditionally reserved for offline, static language compilers.
    123. 

  123. </p>
    124. 

  124. 

  125. <h2>More ...</h2>
    126. 

  126. <p>
    127. 

  127. Click on the LuaJIT sub-topics in the navigation bar to learn more
    128. 

  128. about LuaJIT.
    129. 

  129. </p>
    130. 

  130. <p><p>
    131. 

  131. Click on the Logo in the upper left corner to visit
    132. 

  132. the LuaJIT project page on the web. All other links to online
    133. 

  133. resources are marked with a '<span class="ext">&raquo;</span>'.
    134. 

  134. </p>
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  135. <br class="flush">
    136. 

  136. </div>
    137. 

  137. <div id="foot">
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  138. <hr class="hide">
    139. 

  139. Copyright &copy; 2005-2012 Mike Pall
    140. 

  140. <span class="noprint">
    141. 

  141. &middot;
    142. 

  142. <a href="contact.html">Contact</a>
    143. 

  143. </span>
    144. 

  144. </div>
    145. 

  145. </body>
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  146. </html>
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