Skip to content

Add changelog entry for ARM Windows + free threading wheels #20466

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
ilevkivskyi merged 1 commit into from
Dec 23, 2025
+12 −0
Merged

Add changelog entry for ARM Windows + free threading wheels #20466

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
12 changes: 12 additions & 0 deletions CHANGELOG.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,18 @@ Support for this will be dropped in the first half of 2026!

Contributed by Marc Mueller (PR [20156](https://github.com/python/mypy/pull/20156)).

### Mypyc Accelerated Mypy Wheels for ARM Windows and Free Threading

For best performance, mypy can be compiled to C extension modules using mypyc. This makes
mypy 3-5x faster than when interpreted with pure Python. We now build and upload mypyc
accelerated mypy wheels for `win_arm64` and `cp314t-...` to PyPI, making it easy for Windows
users on ARM and those using the free theading builds for Python 3.14 to realise this speedup
-- just `pip install` the latest mypy.

Contributed by Marc Mueller
(PR [mypy_mypyc-wheels#106](https://github.com/mypyc/mypy_mypyc-wheels/pull/106),
PR [mypy_mypyc-wheels#110](https://github.com/mypyc/mypy_mypyc-wheels/pull/110)).

### Removed flags `--force-uppercase-builtins` and `--force-union-syntax`

The `--force-uppercase-builtins` flag was deprecated and has been a no-op since mypy 1.17.0.
Expand Down