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Title: Python 3.14 free-threaded support by greateggsgreg · Pull Request #2721 · pythonnet/pythonnet · GitHub

Open Graph Title: Python 3.14 free-threaded support by greateggsgreg · Pull Request #2721 · pythonnet/pythonnet

X Title: Python 3.14 free-threaded support by greateggsgreg · Pull Request #2721 · pythonnet/pythonnet

Description: Python for .NET is a package that gives Python programmers nearly seamless integration with the .NET Common Language Runtime (CLR) and provides a powerful application scripting tool for .NET developers. - Python 3.14 free-threaded support by greateggsgreg · Pull Request #2721 · pythonnet/pythonnet

Open Graph Description: First step toward Python 3.14 free-threaded (Py_GIL_DISABLED) support, tracked under #2720 (and the umbrella #2610). After this PR, pythonnet runs the full pytest suite on python3.14t against both ...

X Description: First step toward Python 3.14 free-threaded (Py_GIL_DISABLED) support, tracked under #2720 (and the umbrella #2610). After this PR, pythonnet runs the full pytest suite on python3.14t against both ...

Opengraph URL: https://github.com/pythonnet/pythonnet/pull/2721

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c4688b3https://github.com/pythonnet/pythonnet/commit/c4688b39676d74442154806b909810aa93461b3d
Compare https://github.com/pythonnet/pythonnet/compare/8795938756b156ac614e5c6a7323e03088dc8e37..c4688b39676d74442154806b909810aa93461b3d
May 15, 2026 20:21https://github.com/pythonnet/pythonnet/pull/2721#event-25591833624
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Add concurrent stress tests for PyBuffer.Dispose and CLR-cycle gc.col…https://github.com/pythonnet/pythonnet/pull/2721/commits/84cd07cebb327ff1a68272adc6e0a61db9c55e3f
84cd07chttps://github.com/pythonnet/pythonnet/pull/2721/commits/84cd07cebb327ff1a68272adc6e0a61db9c55e3f
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May 15, 2026 18:10https://github.com/pythonnet/pythonnet/pull/2721#commits-pushed-d9b658d
https://github.com/greateggsgreg
Trim concurrent overhead on hot paths from free-threading prephttps://github.com/pythonnet/pythonnet/pull/2721/commits/d9b658dc283c3a9a5f291eac06730161d123e1d4
d9b658dhttps://github.com/pythonnet/pythonnet/pull/2721/commits/d9b658dc283c3a9a5f291eac06730161d123e1d4
https://github.com/greateggsgreg
Pre-warm ctor binder in concurrent-gc test to avoid first-call racehttps://github.com/pythonnet/pythonnet/pull/2721/commits/20c51ad560ec5af4dddcf8b1dee5bf25e3cd7161
20c51adhttps://github.com/pythonnet/pythonnet/pull/2721/commits/20c51ad560ec5af4dddcf8b1dee5bf25e3cd7161
https://github.com/greateggsgreg
Make MethodBinder.GetMethods lazy init thread-safe under free-threadinghttps://github.com/pythonnet/pythonnet/pull/2721/commits/f5f8ab0dd32abcbd992a19d86d742aaf012ef3ea
f5f8ab0https://github.com/pythonnet/pythonnet/pull/2721/commits/f5f8ab0dd32abcbd992a19d86d742aaf012ef3ea
https://github.com/greateggsgreg
Precompute method precedence to avoid quadratic GetParameters allocat…https://github.com/pythonnet/pythonnet/pull/2721/commits/c5097ebaf563ccbf0196e5acab30a6a55b1bef7b
c5097ebhttps://github.com/pythonnet/pythonnet/pull/2721/commits/c5097ebaf563ccbf0196e5acab30a6a55b1bef7b
https://github.com/greateggsgreg
Zero the slot in ClassDerived.tp_dealloc when tp_clear already ran to…https://github.com/pythonnet/pythonnet/pull/2721/commits/18e4901b6f329afe4d0a35be86bc702e8c95b46a
18e4901https://github.com/pythonnet/pythonnet/pull/2721/commits/18e4901b6f329afe4d0a35be86bc702e8c95b46a
https://github.com/greateggsgreg
Keep ClassDerived wrapper alive across the NewObjectToPython slot dem…https://github.com/pythonnet/pythonnet/pull/2721/commits/e0569d0f46a05f3c91517867a9fad1d719e35abb
e0569d0https://github.com/pythonnet/pythonnet/pull/2721/commits/e0569d0f46a05f3c91517867a9fad1d719e35abb
https://github.com/greateggsgreg
Document private helpers added during free-threading prephttps://github.com/pythonnet/pythonnet/pull/2721/commits/2c9f861ed2be795a57a861b356a63b44f1c1aae6
2c9f861https://github.com/pythonnet/pythonnet/pull/2721/commits/2c9f861ed2be795a57a861b356a63b44f1c1aae6
https://github.com/greateggsgreg
Add debug echoes and a 6-minute step timeout to the Mono test jobhttps://github.com/pythonnet/pythonnet/pull/2721/commits/ee3add404dbc34ddf6a7d84c7351884a811e6c99
ee3add4https://github.com/pythonnet/pythonnet/pull/2721/commits/ee3add404dbc34ddf6a7d84c7351884a811e6c99
https://github.com/greateggsgreg
Drop the per-loop CLR GC.Collect from concurrent-gc test to avoid Mon…https://github.com/pythonnet/pythonnet/pull/2721/commits/414ce700d6e127e6f769f95105e7bec503614baa
414ce70https://github.com/pythonnet/pythonnet/pull/2721/commits/414ce700d6e127e6f769f95105e7bec503614baa
https://github.com/greateggsgreg
Add temporary Mono-step diagnostics on Linux/macOS to locate the x64-…https://github.com/pythonnet/pythonnet/pull/2721/commits/99a99db0646cc5e81a74074eadeb67d16a9fa99c
99a99dbhttps://github.com/pythonnet/pythonnet/pull/2721/commits/99a99db0646cc5e81a74074eadeb67d16a9fa99c
https://github.com/greateggsgreg
Revert temporary Mono-step diagnostics now that the underlying race i…https://github.com/pythonnet/pythonnet/pull/2721/commits/8e7c2bac47579bcbcc0cdca997ab6d8850424ae0
8e7c2bahttps://github.com/pythonnet/pythonnet/pull/2721/commits/8e7c2bac47579bcbcc0cdca997ab6d8850424ae0
https://github.com/greateggsgreg
Merge branch 'master' into freethreading-prephttps://github.com/pythonnet/pythonnet/pull/2721/commits/f8b69a21cb12c6ac0a01c66c4e1165e7cbaf2afa
f8b69a2https://github.com/pythonnet/pythonnet/pull/2721/commits/f8b69a21cb12c6ac0a01c66c4e1165e7cbaf2afa
https://github.com/greateggsgreg
Add user-facing threading guide covering GIL, free-threading, and com…https://github.com/pythonnet/pythonnet/pull/2721/commits/8f2804ca6498f2d152cf1a3ed864526554220413
8f2804chttps://github.com/pythonnet/pythonnet/pull/2721/commits/8f2804ca6498f2d152cf1a3ed864526554220413
https://github.com/greateggsgreg
Harden CollectBasicObject against .NET-GC timing differenceshttps://github.com/pythonnet/pythonnet/pull/2721/commits/9c369edb84e5d9b110aaa2ab0b2d6eeb7208238a
9c369edhttps://github.com/pythonnet/pythonnet/pull/2721/commits/9c369edb84e5d9b110aaa2ab0b2d6eeb7208238a
https://github.com/greateggsgreg
Merge branch 'master' into freethreading-prephttps://github.com/pythonnet/pythonnet/pull/2721/commits/d1b4daae358028400bfe95a4ef356717f07637a4
d1b4daahttps://github.com/pythonnet/pythonnet/pull/2721/commits/d1b4daae358028400bfe95a4ef356717f07637a4
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