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Title: bpo-45116 Fix another performance regression on Windows by neonene · Pull Request #28630 · python/cpython · GitHub

Open Graph Title: bpo-45116 Fix another performance regression on Windows by neonene · Pull Request #28630 · python/cpython

X Title: bpo-45116 Fix another performance regression on Windows by neonene · Pull Request #28630 · python/cpython

Description: Currently, MSVC tends to share the same code blocks in a too big function. In the ceval-loop, NEXTOPARG() or DISPATCH() macros are unexpectedly shared and joined with (long) jump instructions, which disturb PGO profiling. With this PR, MSVC seems to generate expected codes for #25244. https://bugs.python.org/issue45116

Open Graph Description: Currently, MSVC tends to share the same code blocks in a too big function. In the ceval-loop, NEXTOPARG() or DISPATCH() macros are unexpectedly shared and joined with (long) jump instructions, whic...

X Description: Currently, MSVC tends to share the same code blocks in a too big function. In the ceval-loop, NEXTOPARG() or DISPATCH() macros are unexpectedly shared and joined with (long) jump instructions, whic...

Opengraph URL: https://github.com/python/cpython/pull/28630

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bpo-45116 Fix another performance regression on Windows https://github.com/python/cpython/pull/28630/files#top
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92e5fba use only tracing_dispatch if not USE_COMPUTED_GOTOS neonene Sep 29, 2021 https://github.com/python/cpython/pull/28630/commits/92e5fba9f84bc3cc17241b38debee21a55bc3e3b
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