[Python-Dev] Unladen cPickle speedups in 2.7 & 3.1

Philip Jenvey pjenvey at underboss.org
Sat Jan 9 21:09:29 CET 2010

On Jan 9, 2010, at 12:00 PM, skip at pobox.com wrote:

> How much of the Unladen Swallow cPickle speedups have been incorporated into
> 2.7 & 3.1?  I'm working on trying to develop patches for 2.4 and 2.6 (the
> two versions I currently care about at work - we will skip 2.5 entirely).
> It appears some of their speedups may have already been merged to trunk, but
> I'm not sure how much.  If a patch to merge this to 2.7 is already under
> consideration I won't look at it, but I interpreted Collin Winter's response
> to my query on the u-s mailing list that not everything has been done yet.

They've documented their upstream patches here:


Philip Jenvey

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