[issue5683] Speed up cPickle's pickling generally

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> Indeed there are.  Given that the Unladen Swallow folks were focusing on the
> 2.6 branch and their goal was to improve performance I don't see any reason
> to not accept what they've done, then tweak it for 2.7/3.1 assuming the
> changes you and Alexandre suggested further improve performance.

The main thing I'm worried about is the potentially unbounded buffering,
since it could reduce performance (or even thrash the machine) instead
of improving it.

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<http://bugs.python.org/issue5683>
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