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Help latest MSVC 1932 (v143, VS2022) to optimize PyObject_Free() #94841

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neonene opened this issue Jul 14, 2022 · 1 comment
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Help latest MSVC 1932 (v143, VS2022) to optimize PyObject_Free() #94841

neonene opened this issue Jul 14, 2022 · 1 comment
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performance type-bug

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@neonene
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@neonene neonene commented Jul 14, 2022

There is a report that python.org 3.11 Windows release has slowed down on micro benchmarks:

faster-cpython/ideas#420

One reason is that PyObject_Free() is not well optimized by the latest MSVC (ver.1932 in v143 tool set), which is likely to be used for the next 3.10 official as well.

This issue has been reported to the MSVC team. However, their tools would not be fixed urgently.
@neonene neonene added the type-bug label Jul 14, 2022
@bedevere-bot bedevere-bot mentioned this issue Jul 14, 2022
Merged
@AlexWaygood AlexWaygood added the performance label Jul 14, 2022
gvanrossum pushed a commit that referenced this issue Jul 14, 2022
@neonene
gh-94841: Ensure arena_map_get() is inlined in PyObject_Free() (#94842)
9b3f779
miss-islington pushed a commit to miss-islington/cpython that referenced this issue Jul 14, 2022
@neonene @miss-islington
pythongh-94841: Ensure arena_map_get() is inlined in PyObject_Free() (p…
e1a54f4 
…ythonGH-94842)

(cherry picked from commit 9b3f779)

Co-authored-by: neonene <53406459+neonene@users.noreply.github.com>
@bedevere-bot bedevere-bot mentioned this issue Jul 14, 2022
Merged
miss-islington added a commit that referenced this issue Jul 14, 2022
@miss-islington @neonene
gh-94841: Ensure arena_map_get() is inlined in PyObject_Free() (GH-94842
498c649 
)

(cherry picked from commit 9b3f779)

Co-authored-by: neonene <53406459+neonene@users.noreply.github.com>
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@gvanrossum gvanrossum commented Jul 14, 2022

Thank you so much for this one-line fix giving 20% perf improvement (in some cases)!

nascheme pushed a commit that referenced this issue Jul 14, 2022
@neonene @nascheme
[3.10] gh-94841: Ensure arena_map_get() is inlined in PyObject_Free() (…
9d5c175 
…GH-94842)

(cherry picked from commit 9b3f779)

Co-authored-by: neonene <53406459+neonene@users.noreply.github.com>
nascheme pushed a commit to nascheme/cpython that referenced this issue Jul 14, 2022
@neonene @nascheme
[3.10] pythongh-94841: Ensure arena_map_get() is inlined in PyObject_…
7d0fb2b 
…Free() (pythonGH-94842)

Co-authored-by: Neil Schemenauer <nas-github@arctrix.com>
(cherry picked from commit d0850aa170580b494beda030a94fb04254e4acbc)

Co-authored-by: neonene <53406459+neonene@users.noreply.github.com>
@bedevere-bot bedevere-bot mentioned this issue Jul 14, 2022
Merged
nascheme added a commit that referenced this issue Jul 15, 2022
@nascheme @neonene
[3.10] gh-94841: Ensure arena_map_get() is inlined in PyObject_Free() (…
5d26f85 
…GH-94842)

Need to define ALWAYS_INLINE macro for 3.10.

Co-authored-by: neonene <53406459+neonene@users.noreply.github.com>
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@gvanrossum @neonene @AlexWaygood