[issue18685] Restore re performance to pre-PEP393 level

[Matthew Barnett]

Matthew Barnett added the comment:

@Antoine: Are you on the same OS as Serhiy?

IIRC, wasn't the performance regression that wxjmfauth complained about in Python 3.3 apparent on Windows, but not on Linux?

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<http://bugs.python.org/issue18685>
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