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Merged
JukkaL merged 3 commits into from
Nov 27, 2025
Merged

Add draft version of 1.19 release notes #20296

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419750e
Add draft version of 1.19 release notes
p-sawicki Nov 25, 2025
936e7b6
Update CHANGELOG.md
p-sawicki Nov 25, 2025
61404f4
Address review comments
p-sawicki Nov 26, 2025
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Address review comments
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@p-sawicki
p-sawicki committed Nov 26, 2025
commit 61404f49375277d2abf10723bad504d6de8c6b37
11 changes: 2 additions & 9 deletions CHANGELOG.md
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Expand Up @@ -16,7 +16,7 @@ You can read the full documentation for this release on [Read the Docs](http://m
- Switch to a more dynamic SCC processing logic (Ivan Levkivskyi, PR [20053](https://github.com/python/mypy/pull/20053))
- Try some aliases speed-up (Ivan Levkivskyi, PR [19810](https://github.com/python/mypy/pull/19810))

### Fixed‑Format Cache (Experimental)
### Fixed‑Format Cache
- Force-discard cache if cache format changed (Ivan Levkivskyi, PR [20152](https://github.com/python/mypy/pull/20152))
- Use more efficient serialization format for long integers in cache files (Jukka Lehtosalo, PR [20151](https://github.com/python/mypy/pull/20151))
- More robust packing of flats in FF cache (Ivan Levkivskyi, PR [20150](https://github.com/python/mypy/pull/20150))
Expand Down Expand Up @@ -45,14 +45,7 @@ You can read the full documentation for this release on [Read the Docs](http://m
- Fix crash on invalid unpack in base class (Ivan Levkivskyi, PR [19962](https://github.com/python/mypy/pull/19962))
- Traverse ParamSpec prefix where we should (Ivan Levkivskyi, PR [19800](https://github.com/python/mypy/pull/19800))

### Mypyc: Lib-rt
- Add efficient `librt.base64.b64decode` (Jukka Lehtosalo, PR [20263](https://github.com/python/mypy/pull/20263))
- Enable SIMD for `librt.base64` on x86-64 (Jukka Lehtosalo, PR [20244](https://github.com/python/mypy/pull/20244))
- Use faster base64 encode implementation in `librt.base64` (Jukka Lehtosalo, PR [20237](https://github.com/python/mypy/pull/20237))
- Import `librt.base64` capsule automatically if needed (Jukka Lehtosalo, PR [20233](https://github.com/python/mypy/pull/20233))
- Add minimal, experimental `librt.base64` module (Jukka Lehtosalo, PR [20226](https://github.com/python/mypy/pull/20226))

### Mypyc: Support for `__getattr__` and `__setattr__`
### Mypyc: Support for `__getattr__`, `__setattr__`, and `__delattr__`
- Support deleting attributes in `__setattr__` wrapper (Piotr Sawicki, PR [19997](https://github.com/python/mypy/pull/19997))
- Generate `__setattr__` wrapper (Piotr Sawicki, PR [19937](https://github.com/python/mypy/pull/19937))
- Generate `__getattr__` wrapper (Piotr Sawicki, PR [19909](https://github.com/python/mypy/pull/19909))
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