https://github.com/python/cpython/commit/f28cbc9fd3f37656ad55ef2488b65343b97fa902 commit: f28cbc9fd3f37656ad55ef2488b65343b97fa902 branch: main author: Donghee Na <donghee...@python.org> committer: corona10 <donghee.n...@gmail.com> date: 2025-05-10T19:30:16+09:00 summary:
gh-115999: Note Python 3.14 free-threaded changes in What's New (gh-131285) --------- Co-authored-by: Stan Ulbrych <89152624+stanfromirel...@users.noreply.github.com> Co-authored-by: T. Wouters <tho...@python.org> Co-authored-by: mpage <mp...@cs.stanford.edu> files: M Doc/whatsnew/3.14.rst diff --git a/Doc/whatsnew/3.14.rst b/Doc/whatsnew/3.14.rst index 9265024378cc6c..d7b3bac8d85f1f 100644 --- a/Doc/whatsnew/3.14.rst +++ b/Doc/whatsnew/3.14.rst @@ -88,6 +88,7 @@ and improvements in user-friendliness and correctness. * :ref:`PEP 758: Allow except and except* expressions without parentheses <whatsnew314-pep758>` * :ref:`PEP 761: Discontinuation of PGP signatures <whatsnew314-pep761>` * :ref:`PEP 765: Disallow return/break/continue that exit a finally block <whatsnew314-pep765>` +* :ref:`Free-threaded mode improvements <whatsnew314-free-threaded-cpython>` * :ref:`PEP 768: Safe external debugger interface for CPython <whatsnew314-pep768>` * :ref:`PEP 784: Adding Zstandard to the standard library <whatsnew314-pep784>` * :ref:`A new type of interpreter <whatsnew314-tail-call>` @@ -794,6 +795,27 @@ For further information on how to build Python, see (Contributed by Ken Jin in :gh:`128563`, with ideas on how to implement this in CPython by Mark Shannon, Garrett Gu, Haoran Xu, and Josh Haberman.) +.. _whatsnew314-free-threaded-cpython: + +Free-threaded mode +------------------ + +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, Edgar Margffoy, and many others. + +Some of these contributors are employed by Meta, which has continued to provide +significant engineering resources to support this project. + .. _whatsnew314-pyrepl-highlighting: _______________________________________________ Python-checkins mailing list -- python-checkins@python.org To unsubscribe send an email to python-checkins-le...@python.org https://mail.python.org/mailman3/lists/python-checkins.python.org/ Member address: arch...@mail-archive.com
