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gh-134923: Use /GENPROFILE and /USEPROFILE for Windows PGO builds#134924

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zooba merged 1 commit intopython:mainfromzooba:gh-134923
May 30, 2025

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zooba
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@zoobazooba commentedMay 30, 2025
edited by bedevere-appbot
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@zoobazooba requested a review froma team as acode ownerMay 30, 2025 10:03
@bedevere-appbedevere-appbot mentioned this pull requestMay 30, 2025
@zoobazooba added needs backport to 3.13bugs and security fixes needs backport to 3.14bugs and security fixes and removed awaiting core review labelsMay 30, 2025
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There's a test release running athttps://dev.azure.com/Python/cpython/_build/results?buildId=162238&view=results, as CI doesn't enable PGO.

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Test release was good, so I think this is good to go.

@mdboom FYI, in case this might affect your benchmarking.

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I'll kick off a benchmarking run of this PR right now to confirm no negative impact.

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I'll kick off a benchmarking run of this PR right now to confirm no negative impact.

Theresults are here. Less than 0.01% slower overall, so "within the noise".

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Good to know, thanks! From the docs it sounds like if anything, the time it takes to collect the profile is improved, but we don't really care too much about that anyway.

@zoobazooba merged commit8865b4f intopython:mainMay 30, 2025
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Thanks@zooba for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14.
🐍🍒⛏🤖

@zoobazooba deleted the gh-134923 branchMay 30, 2025 18:37
miss-islington pushed a commit to miss-islington/cpython that referenced this pull requestMay 30, 2025
…ds (pythonGH-134924)(cherry picked from commit8865b4f)Co-authored-by: Steve Dower <steve.dower@python.org>
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Sorry,@zooba, I could not cleanly backport this to3.13 due to a conflict.
Please backport usingcherry_picker on command line.

cherry_picker 8865b4f95b32097099d252111669b88ec7c1eb7f 3.13

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GH-134950 is a backport of this pull request to the3.14 branch.

@bedevere-appbedevere-appbot removed the needs backport to 3.14bugs and security fixes labelMay 30, 2025
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GH-134951 is a backport of this pull request to the3.13 branch.

@bedevere-appbedevere-appbot removed the needs backport to 3.13bugs and security fixes labelMay 30, 2025
zooba added a commit that referenced this pull requestMay 30, 2025
…-134924)(cherry picked from commit8865b4f)Co-authored-by: Steve Dower <steve.dower@python.org>
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