Antoine Pitrou added the comment:
Non-greedy matching actually makes things worse :-)
$ ./python -m timeit -s "import re; pat = re.compile('\A*a*a*a\Z'.replace('*',
'[^.]+'), re.IGNORECASE)" "pat.match('a' * 100 +'z')"
100 loops, best of 3: 3.31 msec per loop
$ ./python -m timeit -s "import re; pat = re.compile('\A*a*a*a\Z'.replace('*',
'[^.]+?'), re.IGNORECASE)" "pat.match('a' * 100 +'z')"
100 loops, best of 3: 6.91 msec per loop
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue17980>
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