[Python-Dev] interesting article on regex performance (original) (raw)
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Fri Mar 12 20:29:09 CET 2010
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>> There are major practical problems associated with making such a leap
>> directly (Google's re2 engine is in C++ rather than C and we'd have
>> to keep the existing implementation around regardless to handle the
>> features that re2 doesn't support).
Collin> I don't see why C++ would be a deal-breaker in this case, since
Collin> it would be restricted to an extension module.Traditionally Python has run on some (minority) platforms where C++ was unavailable. While the re module is a dynamically linked extension module and thus could be considered "optional", I doubt anybody thinks of it as optional nowadays. It's used in the regression test suite anyway. It would be tough to run unit tests on such minority platforms without it. You'd have to maintain both the current sre implementation and the new re2 implementation for a long while into the future.
As I was reading the code I thought, "Great! This stuff is so simple. It's even all written in C." Then I looked at the re2 page. :-(
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