[Python-Dev] 2to3 speedup patch

[David Wolever]

Under the instruction of Martin, I've made some small changes to 2to3  
so keeps track of which fixers act on which level of node.  The  
speedup isn't too shabby: running on the example file, processing  
time went from 9 to 7 seconds, and the test suite dropped from 400 to  
350.

I have attached the hacky, ugly, proof-of-concept patch to http:// 
bugs.python.org/issue2431

If there's no reason not to implement this sort of thing, I'll clean  
it up and commit it when I get home (or something).

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   David Wolever - http://wolever.net/~wolever
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