Add no-GIL interpreter support #641
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Add `pytest-run-parallel` as dependency, test no-GIL interpreters in CI, and mark Cython module as safe for freethreaded interpreters.
lysnikolaou
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Aug 6, 2025
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Hey @clin1234! Thanks for working on this. I'm not the maintainer here, but I'm leaving a couple of comments to help move this forward.
Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
lysnikolaou
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Aug 7, 2025
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Thanks for iterating on this so quickly @clin1234! Left some more comments on here. Hope these are helpful!
On Windows, attempting to upgrade `pip` within CI always yields this: ``` Run pip install -U pip Requirement already satisfied: pip in c:\hostedtoolcache\windows\python\3.10.11\x64\lib\site-packages (25.1.1) Collecting pip Downloading pip-25.2-py3-none-any.whl.metadata (4.7 kB) Downloading pip-25.2-py3-none-any.whl (1.8 MB) ---------------------------------------- 1.8/1.8 MB 48.1 MB/s eta 0:00:00 Notice: A new release of pip is available: 25.1.1 -> 25.2 Notice: To update, run: python.exe -m pip install --upgrade pip ERROR: To modify pip, please run the following command: C:\hostedtoolcache\windows\Python\3.10.11\x64\python.exe -m pip install -U pip Error: Process completed with exit code 1. ```
ferdnyc
reviewed
Sep 5, 2025
methane
reviewed
Sep 6, 2025
Co-authored-by: Frank Dana <ferdnyc@gmail.com>
Co-authored-by: Frank Dana <ferdnyc@gmail.com>
Per msgpack#641 (comment), sharing more than one `Packer` object is not supported.
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