Merged revisions 61596-61597 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

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  r61596 | martin.v.loewis | 2008-03-18 23:43:46 -0500 (Di, 18 Mär 2008) | 2 lines

  Import lib2to3.
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  r61597 | martin.v.loewis | 2008-03-18 23:58:04 -0500 (Di, 18 Mär 2008) | 3 lines

  Initialized merge tracking via "svnmerge" with revisions "1-61595" from
  svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3
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Lib/lib2to3/tests/benchmark.py

@@ -0,0 +1,58 @@
+#!/usr/bin/env python2.5
+"""
+This is a benchmarking script to test the speed of 2to3's pattern matching
+system. It's equivalent to "refactor.py -f all" for every Python module
+in sys.modules, but without engaging the actual transformations.
+"""
+
+__author__ = "Collin Winter <collinw at gmail.com>"
+
+# Python imports
+import os.path
+import sys
+from time import time
+
+# Test imports
+from support import adjust_path
+adjust_path()
+
+# Local imports
+from .. import refactor
+
+### Mock code for refactor.py and the fixers
+###############################################################################
+class Options:
+    def __init__(self, **kwargs):
+        for k, v in kwargs.items():
+            setattr(self, k, v)
+
+        self.verbose = False
+        
+def dummy_transform(*args, **kwargs):
+    pass
+    
+### Collect list of modules to match against
+###############################################################################
+files = []
+for mod in sys.modules.values():
+    if mod is None or not hasattr(mod, '__file__'):
+        continue
+    f = mod.__file__
+    if f.endswith('.pyc'):
+        f = f[:-1]
+    if f.endswith('.py'):
+        files.append(f)
+
+### Set up refactor and run the benchmark
+###############################################################################
+options = Options(fix=["all"], print_function=False, doctests_only=False)
+refactor = refactor.RefactoringTool(options)
+for fixer in refactor.fixers:
+    # We don't want them to actually fix the tree, just match against it.
+    fixer.transform = dummy_transform
+
+t = time()
+for f in files:
+    print "Matching", f
+    refactor.refactor_file(f)
+print "%d seconds to match %d files" % (time() - t, len(sys.modules))