Jeroen Demeyer <j.deme...@ugent.be> added the comment:
I did some benchmarks WITHOUT PGO (simply because it's much faster to compile and therefore easier to test things out). The command I used for testing is ./python -m perf timeit --duplicate 200 -s 'f = len; x = ()' 'f(x)' * d30da5dd9a8a965cf24a22bbaff8a5b1341c2944 (before PEP 590) Mean +- std dev: 25.1 ns +- 0.2 ns * aacc77fbd77640a8f03638216fa09372cc21673d (first commit of PEP 590) Mean +- std dev: 29.3 ns +- 0.9 ns * b8e198a5d09ca876b87baaf6efd2b2e7c9e3a0b3 (3.8 branch) Mean +- std dev: 29.5 ns +- 0.3 ns * cd6e83b4810549c308ab2d7315dbab526e35ccf6 (master) Mean +- std dev: 25.1 ns +- 0.2 ns So there does seem to be a regression with 3.8 but not with 3.9. I don't know what to do with this... can we backport more of the PEP 590 commits to 3.8? Or will the release manager complain? ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue37562> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
