[issue2431] 2to3 is rather slow

[Collin Winter]

Collin Winter <collinw at gmail.com> added the comment:

Yes, and each new fixer makes it slower. The biggest problem is the
pattern matching system, which tends to take 99% of the running time.
I've talked to several people who are interested in optimizing 2to3 as a
GSoC project, though, so I anticipate some speed ups coming through that.

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