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gh-115999: Note Python 3.14 free-threaded changes in What's New#131285

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corona10 merged 14 commits intopython:mainfromcorona10:gh-11599-docs
May 10, 2025

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@corona10corona10 commentedMar 15, 2025•
edited by bedevere-appbot
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@bedevere-appbedevere-appbot added docsDocumentation in the Doc dir skip news awaiting core review labelsMar 15, 2025
@corona10corona10 changed the title gh-11599: Update whats news for free-threaded 3.14 gh-115999: Update whats news for free-threaded 3.14Mar 15, 2025
@corona10corona10 requested a review fromYhg1sMarch 15, 2025 14:09
and 10-15% slower than the default build.

This work was done by many contributors, Matt Page, Neil Schemenauer,
Sam Gross, Thomas Wouters, Donghee Na, Kirill Podoprigora and Ken Jin.
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I also added the@Fidget-Spinner, because I remember his early design involvation while he worked at Quansight.

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@Fidget-SpinnerFidget-SpinnerMar 15, 2025•
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I think the main thing I did that is coming in 3.14 is the stackrefs. But we needed that for the intepreter anyways so it probably counts? Either way I can be left out if the others feel inclined to.

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corona10 commentedMar 15, 2025•
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Anyway, feel free to propose change as same as what we did for 3.13.

corona10and others added3 commitsMarch 16, 2025 10:37
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
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@Yhg1s Do you have suggestions for this What's News? I think that you can modify more properly :)

corona10and others added3 commitsMay 10, 2025 00:32
Co-authored-by: T. Wouters <thomas@python.org>
Co-authored-by: T. Wouters <thomas@python.org>
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Lines need to be wrapped to 80 chars.

Impossible to review at the moment

Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
Comment on lines 803 to 808
Free-threaded mode (:pep:`703`), initially added in 3.13, has been significantly improved. The implementation described in PEP 703 was finished, including C API changes, and temporary workarounds in the interpreter were replaced with more permanent solutions. The specializing adaptive interpreter (:pep:`659`) is now enabled in free-threaded mode, which along with many other optimizations greatly improves its performance. The performance penalty on single-threaded code in free-threaded mode is now roughly 5-10%, depending on platform and C compiler used.

This work was done by many contributors: Sam Gross, Matt Page, Neil Schemenauer, Thomas Wouters, Donghee Na, Kirill Podoprigora, Ken Jin, Itamar Oren, Brett Simmers, Dino Viehland, Nathan Goldbaum, Ralf Gommers,
Lysandros Nikolaou, and many others.

Some of these contributors are employed by Meta, which has continued to provide significant engineering resources to support this project.
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Suggested change
Free-threaded mode (:pep:`703`), initially added in 3.13, has been significantly improved. The implementation described in PEP 703 was finished, including C API changes, and temporary workarounds in the interpreter were replaced with more permanent solutions. The specializing adaptive interpreter (:pep:`659`) is now enabled in free-threaded mode, which along with many other optimizations greatly improves its performance. The performance penalty on single-threaded code in free-threaded mode is now roughly 5-10%, depending on platform and C compiler used.
This work was done by many contributors: Sam Gross, Matt Page, Neil Schemenauer, Thomas Wouters, Donghee Na, Kirill Podoprigora, Ken Jin, Itamar Oren, Brett Simmers, Dino Viehland, Nathan Goldbaum, Ralf Gommers,
Lysandros Nikolaou, and many others.
Some of these contributors are employed by Meta, which has continued to provide significant engineering resources to support this project.
Free-threaded mode (:pep:`703`), initially added in 3.13, has been significantly
improved. The implementation described in PEP 703 was finished, including C API
changes, and temporary workarounds in the interpreter were replaced with more
permanent solutions. The specializing adaptive interpreter (:pep:`659`) is now
enabled in free-threaded mode, which along with many other optimizations
greatly improves its performance. The performance penalty on single-threaded
code in free-threaded mode is now roughly 5-10%, depending on platform and C
compiler used.
This work was done by many contributors: Sam Gross, Matt Page, Neil Schemenauer,
Thomas Wouters, Donghee Na, Kirill Podoprigora, Ken Jin, Itamar Oren, Brett Simmers,
Dino Viehland, Nathan Goldbaum, Ralf Gommers, Lysandros Nikolaou, and many others.
Some of these contributors are employed by Meta, which has continued to provide
significant engineering resources to support this project.

Wrapped it for you:-)

corona10and others added2 commitsMay 10, 2025 08:34
Co-authored-by: mpage <mpage@cs.stanford.edu>
Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
@AA-TurnerAA-Turner changed the title gh-115999: Update whats news for free-threaded 3.14 gh-115999: Note Python 3.14 free-threaded changes in What's NewMay 10, 2025
@AA-TurnerAA-Turner added the needs backport to 3.14bugs and security fixes labelMay 10, 2025
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@Yhg1s@mpage If no update is needed, I will merge this in this weekend.

Free-threaded mode (:pep:`703`), initially added in 3.13, has been significantly improved. The implementation described in PEP 703 was finished, including C API changes, and temporary workarounds in the interpreter were replaced with more permanent solutions. The specializing adaptive interpreter (:pep:`659`) is now enabled in free-threaded mode, which along with many other optimizations greatly improves its performance. The performance penalty on single-threaded code in free-threaded mode is now roughly 5-10%, depending on platform and C compiler used.

This work was done by many contributors: Sam Gross, Matt Page, Neil Schemenauer, Thomas Wouters, Donghee Na, Kirill Podoprigora, Ken Jin, Itamar Oren, Brett Simmers, Dino Viehland, Nathan Goldbaum, Ralf Gommers,
Lysandros Nikolaou, Kumar Aditya, and many others.

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Can you add Edgar Margffoy as well please? We forgot him in the 3.13 notes I think

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Done!

@pythonpython deleted a comment fromtrevorgraysonMay 10, 2025
@corona10corona10 merged commitf28cbc9 intopython:mainMay 10, 2025
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Thanks@corona10 for the PR 🌮🎉.. I'm working now to backport this PR to: 3.14.
🐍🍒⛏🤖

@github-project-automationgithub-project-automationbot moved this fromTodo toDone inDocs PRsMay 10, 2025
miss-islington pushed a commit to miss-islington/cpython that referenced this pull requestMay 10, 2025
…pythongh-131285)---------(cherry picked from commitf28cbc9)Co-authored-by: Donghee Na <donghee.na@python.org>Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>Co-authored-by: T. Wouters <thomas@python.org>Co-authored-by: mpage <mpage@cs.stanford.edu>
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GH-133824 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 10, 2025
@corona10corona10 deleted the gh-11599-docs branchMay 10, 2025 10:30
corona10 added a commit that referenced this pull requestMay 10, 2025
gh-131285) (gh-133824)gh-115999: Note Python 3.14 free-threaded changes in What's New (gh-131285)---------(cherry picked from commitf28cbc9)Co-authored-by: Donghee Na <donghee.na@python.org>Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>Co-authored-by: T. Wouters <thomas@python.org>Co-authored-by: mpage <mpage@cs.stanford.edu>
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