[issue45116] Performance regression 3.10b1 and later on Windows: Py_DECREF() not inlined in PGO build

[Ken Jin]

Ken Jin <kenjin4096 at gmail.com> added the comment:

Like what Ma Lin and neonene have mentioned above, PR28475 recovered half of the lost performance. It's unfortunately still 4% slower than 3.10a7.

>pyperf compare_to 310a7.json 310rc2.json 310rc2patched.json

Geometric mean (versus 3.10a7)
==============

310rc2: 1.09x slower
310rc2patched: 1.04x slower

Attached pyperf benchmark comparisons file.

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Added file: https://bugs.python.org/file50293/PR28475_vs_310rc2_vs_310a7.txt

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