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3.11: Performance regression in ctypes #92356

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3.11: Performance regression in ctypes#92356
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performancePerformance or resource usagetopic-ctypestype-bugAn unexpected behavior, bug, or error

Description

@mdboom
mdboom
opened on May 5, 2022

Bug report

There is an approximately 8% performance regression in function call overhead in ctypes in py3.11.0a7 vs. py3.10.4. On my machine, 280 ns/call vs. 235 ns/call.

Gist to reproduce.

Additional context in faster-cpython/ideas#370.

Your environment

Both Python versions built from source with pgo on Fedora Linux 36, x86_64.

Activity

  1. mdboom
    added
    type-bugAn unexpected behavior, bug, or error
    on May 5, 2022
  2. AlexWaygood
    added
    performancePerformance or resource usage
    topic-ctypes
    on May 5, 2022
  3. mdboom
    added a commit that references this issue on May 5, 2022

    pythongh-92356: Fix regression in ctypes function call overhead

    9486b1e
  4. JelleZijlstra
    closed this as completedon May 6, 2022
  5. JelleZijlstra
    added a commit that references this issue on May 6, 2022

    gh-92356: Fix regression in ctypes function call overhead (#92357)

    adcb6a6
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