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Author vstinner
Recipients methane, python-dev, rhettinger, serhiy.storchaka, vstinner, yselivanov
Date 2017-02-10.09:20:04
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Message-id <1486718404.33.0.995058692229.issue29507@psf.upfronthosting.co.za>
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> performance benefit is small.
> https://gist.github.com/methane/32fe57cd4aaac1c5c37f75cbbfbe7562

Are you using PGO+LTO compilation? Without PGO, the noise of code placement can be too high. In your "perf stat" comparisons, I see that "insn per cycle" is lower with the patch, which sounds like a code placement issue like a performance issue with the patch.
History
Date User Action Args
2017-02-10 09:20:04vstinnersetrecipients: + vstinner, rhettinger, methane, python-dev, serhiy.storchaka, yselivanov
2017-02-10 09:20:04vstinnersetmessageid: <1486718404.33.0.995058692229.issue29507@psf.upfronthosting.co.za>
2017-02-10 09:20:04vstinnerlinkissue29507 messages
2017-02-10 09:20:04vstinnercreate