Import lib2to3.
diff --git a/Lib/lib2to3/tests/benchmark.py b/Lib/lib2to3/tests/benchmark.py
new file mode 100644
index 0000000..7ccdd17
--- /dev/null
+++ b/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))