Author rhettinger
Recipients jcea, jcon, python-dev, rhettinger, serhiy.storchaka, sfllaw
Date 2013-01-13.21:35:23
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Message-id <1358112924.24.0.40028991246.issue16398@psf.upfronthosting.co.za>
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Jesús, I backported this to 2.7 because it was affecting intended usability of multiple parts of the API.  The current code had the egregious and unintended side-effect of touching every data element during a rotate -- this resulted in a huge number of unnecessary cache line misses and was blowing useful data out of cache.

IMO, a performance bug is different from a micro-optimization, especially if it is affecting the intended uses for part of an API.

Serhiy, you're welcome to backport to 3.3 if you desire.
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2013-01-13 21:35:24rhettingersetrecipients: + rhettinger, jcea, sfllaw, python-dev, jcon, serhiy.storchaka
2013-01-13 21:35:24rhettingersetmessageid: <1358112924.24.0.40028991246.issue16398@psf.upfronthosting.co.za>
2013-01-13 21:35:24rhettingerlinkissue16398 messages
2013-01-13 21:35:23rhettingercreate