[issue30340] Optimize out non-capturing groups

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

$ ./python -m timeit -s "import re; p = re.compile(r'[a-z]|[0-9]'); s = ' '*10000+'x'"  "p.search(s)"
Unpatched:  500 loops, best of 5: 732 usec per loop
Patched:    1000 loops, best of 5: 279 usec per loop

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30340>
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