[issue9685] tuples should remember their hash value

[Benjamin Peterson]

Benjamin Peterson <benjamin at python.org> added the comment:

2010/8/25 Raymond Hettinger <report at bugs.python.org>:
> I suppose we could prepare a patch, instrument it, and try it with Twisted, SQLalchemy, and Django to find-out how many tuple hash calculations would be saved by memoizing.

You should also check memory usage.

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