[issue2459] speedup for / while / if with better bytecode

[Jeffrey Yasskin]

Jeffrey Yasskin <jyasskin at gmail.com> added the comment:

No particular reason for cPickle. It sometimes shows when we've caused
problems by increasing the code size, and shows the size of any random
effects that the compiler causes by moving code around. Could you
double-check the patch to see if I did anything dumb?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue2459>
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