[issue45116] Performance regression 3.10b1 and later on Windows: Py_DECREF() not inlined in PGO build
neonene
report at bugs.python.org
Tue Sep 21 02:01:53 EDT 2021
neonene <nicesalmon at gmail.com> added the comment:
I built 3.10rc2 PGO with PR28475 applied, and posted the inliner's log.
In the log, the 4-callees mentioned above are now inlined, which were "hard reject"ed before.
As for the performance, a few reporters may be needed, but it's not necessary for them to care about noises in the apparent gap.
310rc2 x64 PGO : 1.00
+ PR28475 build1 bench1 : 1.05x faster (slower 7, faster 43, nochange 8)
bench2 : 1.05x faster (slower 2, faster 43, nochange 13)
build2 : 1.05x faster (slower 4, faster 45, nochange 9)
310rc2 x64 release : 1.00
+ PR28475 : 1.01x faster (slower 14, faster 25, nochange 19)
Is Windows involved in the faster-cpython project? If so, the project should be provided with Windows machines for validation.
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Added file: https://bugs.python.org/file50291/PR28475_inline.log
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