[issue2650] re.escape should not escape underscore

[James Y Knight]

James Y Knight <foom at users.sourceforge.net> added the comment:

Show your speed test? Looks 2.5x faster to me. But I'm running this on python 2.6, so I guess it's possible that the re module's speed was decimated in Py3k.


python -m timeit -s "$(printf "import re\ndef escape(s):\n return re.sub('([][.^$*+?{}\\|()])', '\\\1', s)")" 'escape("!@#$%^&*()!@#$%^&*()!@#$%^&*()!@#$%^&*()!@#$%^&*()!@#$%^&*()!@#$%^&*()!@#$%^&*()")'
100000 loops, best of 3: 18.4 usec per loop


python -m timeit -s "import re" 're.escape("!@#$%^&*()!@#$%^&*()!@#$%^&*()!@#$%^&*()!@#$%^&*()!@#$%^&*()!@#$%^&*()!@#$%^&*()")'
10000 loops, best of 3: 45.7 usec per loop

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<http://bugs.python.org/issue2650>
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