10000 gh-132952: Import _io instead of io at startup by JelleZijlstra · Pull Request #132957 · python/cpython · GitHub
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gh-132952: Import _io instead of io at startup #132957

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Merged
merged 6 commits into from
Apr 28, 2025
Merged

gh-132952: Import _io instead of io at startup #132957

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gh-132952: Import _io instead of io at startup
JelleZijlstra Apr 25, 2025
e3432b7
Also lazy-import in site
JelleZijlstra Apr 26, 2025
ebe8890
blurb
JelleZijlstra Apr 26, 2025
c3cfa67
Set the __module__ of UnsupportedOperation even if io is not imported
JelleZijlstra Apr 26, 2025
6c40c3a
add test
JelleZijlstra Apr 26, 2025
71bfe4d
Drop 19% claim
JelleZijlstra Apr 28, 2025
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Drop 19% claim
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@JelleZijlstra
JelleZijlstra committed Apr 28, 2025
commit 71bfe4d78fbe806846f0c63d3eee4aaafb9dc4cc
6 changes: 4 additions & 2 deletions Misc/NEWS.d/next/Core_and_Builtins/2025-04-26-08-49-05.gh-issue-132952.ifvP10.rst
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Speed up startup with the ``-S`` argument by about 19% by importing the
private ``_io`` module instead of :mod:`io`.
Speed up startup with the ``-S`` argument by importing the
private ``_io`` module instead of :mod:`io`. This fixes a performance
regression introduced earlier in Python 3.14 development and restores performance
to the level of Python 3.13.
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