Fix web2py compile and race condition bugs (#2272)

frameworks/Python/web2py/README.md

@@ -8,7 +8,7 @@ review the [documentation](http://frameworkbenchmarks.readthedocs.org/en/latest/
 Also note that there is additional information provided in
 the [Python README](../).
 
-There are two sets of web2py tests, "web2py-standard" (the default) and "web2py-optimized". The former set is implemented via standard web2py production code. The latter involves several special optimizations that would not be typical of a web2py application but could be implemented in cases were performance is critical.
+There are two sets of web2py tests, "web2py-standard" (the default) and "web2py-optimized". The former set is implemented via standard web2py production code. The latter involves several special optimizations that would not be typical of a web2py application but could be implemented in cases where performance is critical.
 
 ## Web Server and Database Client Software
 

frameworks/Python/web2py/app/standard/modules/controller.py

@@ -34,8 +34,6 @@ def updates():
     update_world = db.update_world
     r10k = partial(randint, 1, 10000)
     worlds = []
-    #ids = [r10k() for _ in xrange(num_queries)]
-    #ids.sort() # To avoid deadlock
     for wid in (r10k() for _ in xrange(num_queries(current.request.vars.queries))):
         world = get_world(wid)
         newNumber = r10k()

frameworks/Python/web2py/app/standard/modules/database.py

@@ -16,6 +16,9 @@ class Dal(object):
             self.db.define_table('Fortune', Field('message'))
 
     def get_world(self, wid):
+        # Setting `cacheable=True` improves performance by foregoing the creation
+        # of some non-essential attributes. It does *not* actually cache the
+        # database results (it simply produces a Rows object that *could be* cached).
         return self.db(self.db.World.id == wid).select(cacheable=True)[0].as_dict()
 
     def update_world(self, wid, randomNumber):

frameworks/Python/web2py/setup.sh

@@ -7,7 +7,10 @@ pip install --install-option="--prefix=${PY2_ROOT}" -r $TROOT/requirements.txt
 rm -fr web2py
 git clone --recursive --branch master https://github.com/web2py/web2py.git
 cd web2py
-git checkout 326335c3cd027a97b9c2b83d880b2b1f8f62321d
+# The following commit is checked out in order to take advantage of several
+# bug fixes that were made after the latest stable release. This can be changed
+# in future rounds once a new stable release has been made.
+git checkout 44362aa42948dca08ddf1b2f86ac03c69b0d48e4
 cd ..
 cp -r app/standard/ web2py/applications/
 cp -r app/optimized/ web2py/applications/