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perf: faster canonicalize_version#993

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henryiii merged 1 commit intopypa:mainfrom
henryiii:henryiii/perf/canonicalize_version
Nov 27, 2025
Merged

perf: faster canonicalize_version#993
henryiii merged 1 commit intopypa:mainfrom
henryiii:henryiii/perf/canonicalize_version

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@henryiii
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@henryiii henryiii commented Nov 26, 2025

I was looking at the Python 3.15 flamegraph for SpecifierSet's (using all python-required on PyPI), and noticed a lot of time was spent inside this singledispatch. Dropping it simplifies the code and makes creating SpecifierSet's take 7% less time.

Signed-off-by: Henry Schreiner <[email protected]>

if isinstance(version, str):
try:
version = str(Version(version))
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Isn't str redundant here?

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@henryiii henryiii Nov 27, 2025

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I think mypy had an issue without it? I know it was acting up here, it didn't like some variations.

Almost sure mypy gets confused in the except block without it. The other fix was to make this a new variable but then I have to add an else.

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Right, that makes sense, we're inside an isinstance(version, str) block, so MyPy is not going to be happy if you assign version a type which it isn't declared for, even if it's not actually needed.

@notatallshaw
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Dropping it simplifies the code

I agree, I had to read up on this single dispatch pattern, it might be helpful when dealing with a large array of types, but we only have two types here.

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It's really nice for a specific type of design where you register every type you know how to handle. I use it in uproot-browser to register types we know how to plot, it's nice there. Not great for this, though, and I don't think I've seen a registered dispatch call the original like this before.

@henryiii henryiii merged commit cf45527 into pypa:main Nov 27, 2025
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@henryiii henryiii deleted the henryiii/perf/canonicalize_version branch November 27, 2025 07:19
radermacher-iits pushed a commit to kubara-io/kubara that referenced this pull request Feb 19, 2026
This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [packaging](https://github.com/pypa/packaging) | packages | major | `==25.0` → `==26.0` |

---

### Release Notes

<details>
<summary>pypa/packaging (packaging)</summary>

### [`v26.0`](https://github.com/pypa/packaging/releases/tag/26.0)

[Compare Source](pypa/packaging@25.0...26.0)

Read about the performance improvements here: <https://iscinumpy.dev/post/packaging-faster>.

#### What's Changed

Features:

- PEP 751: support pylock by [@&#8203;sbidoul](https://github.com/sbidoul) in [#&#8203;900](pypa/packaging#900)
- PEP 794: import name metadata by [@&#8203;brettcannon](https://github.com/brettcannon) in [#&#8203;948](pypa/packaging#948)
- Support writing metadata by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;846](pypa/packaging#846)
- Support `__replace__` for `Version` by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1003](pypa/packaging#1003)
- Support positional pattern matching for `Version` and `Specifier` by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1004](pypa/packaging#1004)

Behavior adaptations:

- PEP 440 handling of prereleases for `Specifier.contains`, `SpecifierSet.contains`, and `SpecifierSet.filter` by [@&#8203;notatallshaw](https://github.com/notatallshaw) in [#&#8203;897](pypa/packaging#897)
- Handle PEP 440 edge case in `SpecifierSet.filter` by [@&#8203;notatallshaw](https://github.com/notatallshaw) in [#&#8203;942](pypa/packaging#942)
- Adjust arbitrary equality intersection preservation in `SpecifierSet` by [@&#8203;notatallshaw](https://github.com/notatallshaw) in [#&#8203;951](pypa/packaging#951)
- Return `False` instead of raising for `.contains` with invalid version by [@&#8203;Liam-DeVoe](https://github.com/Liam-DeVoe) in [#&#8203;932](pypa/packaging#932)
- Support arbitrary equality on arbitrary strings for `Specifier` and `SpecifierSet`'s `filter` and `contains` method. by [@&#8203;notatallshaw](https://github.com/notatallshaw) in [#&#8203;954](pypa/packaging#954)
- Only try to parse as `Version` on certain marker keys, return `False` on unequal ordered comparsions by [@&#8203;JP-Ellis](https://github.com/JP-Ellis) in [#&#8203;939](pypa/packaging#939)

Fixes:

- Update `_hash` when unpickling `Tag()` by [@&#8203;dholth](https://github.com/dholth) in [#&#8203;860](pypa/packaging#860)
- Correct comment and simplify implicit prerelease handling in `Specifier.prereleases` by [@&#8203;notatallshaw](https://github.com/notatallshaw) in [#&#8203;896](pypa/packaging#896)
- Use explicit `_GLibCVersion` `NamedTuple` in `_manylinux` by [@&#8203;cthoyt](https://github.com/cthoyt) in [#&#8203;868](pypa/packaging#868)
- Detect invalid license expressions containing `()` by [@&#8203;bwoodsend](https://github.com/bwoodsend) in [#&#8203;879](pypa/packaging#879)
- Correct regex for metadata `'name'` format by [@&#8203;di](https://github.com/di) in [#&#8203;925](pypa/packaging#925)
- Improve the message around expecting a semicolon by [@&#8203;pradyunsg](https://github.com/pradyunsg) in [#&#8203;833](pypa/packaging#833)
- Support nested parens in license expressions by [@&#8203;Liam-DeVoe](https://github.com/Liam-DeVoe) in [#&#8203;931](pypa/packaging#931)
- Add space before at symbol in `Requirements` string by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;953](pypa/packaging#953)
- A root logger use found by ruff LOG, use `packaging` logger instead by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;965](pypa/packaging#965)
- Better support for subclassing `Marker` and `Requirement` by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1022](pypa/packaging#1022)
- Normalize all extras, not just if it comes first by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1024](pypa/packaging#1024)
- Don't produce a broken repr if `Marker` fails to construct by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1033](pypa/packaging#1033)

Performance:

- Avoid recompiling regexes in the tokenizer for a 3x speedup by [@&#8203;hauntsaninja](https://github.com/hauntsaninja) in [#&#8203;1019](pypa/packaging#1019)
- Improve performance in `_manylinux.py` by [@&#8203;cthoyt](https://github.com/cthoyt) in [#&#8203;869](pypa/packaging#869)
- Minor cleanups to `Version` by [@&#8203;bearomorphism](https://github.com/bearomorphism) in [#&#8203;913](pypa/packaging#913)
- Skip redundant creation of `Version`s in specifier comparison by [@&#8203;notatallshaw](https://github.com/notatallshaw) in [#&#8203;986](pypa/packaging#986)
- Cache `Specifier`'s Version by [@&#8203;notatallshaw](https://github.com/notatallshaw) in [#&#8203;985](pypa/packaging#985)
- Make `Version` a little faster by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;987](pypa/packaging#987)
- Minor `Version` regex cleanup by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;990](pypa/packaging#990)
- Faster regex on Python 3.11.5+ by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;988](pypa/packaging#988) and [#&#8203;1055](pypa/packaging#1055)
- Lazily calculate `_key` in `Version` by [@&#8203;notatallshaw](https://github.com/notatallshaw) in [#&#8203;989](pypa/packaging#989) and regression for `packaging_legacy` fixed by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1048](pypa/packaging#1048)
- Faster `canonicalize_version` by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;993](pypa/packaging#993)
- Use `fullmatch` in a couple more places by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;992](pypa/packaging#992)
- Use `fullmatch` for markers too by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1029](pypa/packaging#1029)
- Use `map` instead of generator by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;996](pypa/packaging#996)
- Deprecate `._version` (`_Version`, a `NamedTuple`) by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;995](pypa/packaging#995) and [#&#8203;1062](pypa/packaging#1062)
- Avoid duplicate `Version` creation in `canonicalize_version` by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;994](pypa/packaging#994)
- Add `__slots__` to `Version` by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1001](pypa/packaging#1001)
- Add `__slots__` to `Specifier`s by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1002](pypa/packaging#1002)
- Add `__slots__` to `Node`s by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1032](pypa/packaging#1032)
- Use `version.__replace__` in specifier comparison by [@&#8203;notatallshaw](https://github.com/notatallshaw) in [#&#8203;999](pypa/packaging#999)
- Use `_get_spec_version` in more places in `Specifier` by [@&#8203;notatallshaw](https://github.com/notatallshaw) in [#&#8203;1005](pypa/packaging#1005)
- Pull `set` construction out of function by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1012](pypa/packaging#1012)
- Letter normalization dict for prereleases and the like by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1014](pypa/packaging#1014)
- Avoid normalizing extras again when comparing by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1028](pypa/packaging#1028)
- Speed up `Version.__str__` by about 10% by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;997](pypa/packaging#997)
- Increase the performance of `canonicalize_name` by avoiding a regex by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1030](pypa/packaging#1030), [#&#8203;1047](pypa/packaging#1047), and [#&#8203;1064](pypa/packaging#1064)
- Faster zero stripping by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1058](pypa/packaging#1058)

Type annotations:

- Fix a type annotation by [@&#8203;brettcannon](https://github.com/brettcannon) in [#&#8203;907](pypa/packaging#907)
- Fix tags return type in `parse_wheel_filename` docs by [@&#8203;ncoghlan](https://github.com/ncoghlan) in [#&#8203;973](pypa/packaging#973)
- Add type hint for `_version` in `.version.Version` by [@&#8203;brettcannon](https://github.com/brettcannon) in [#&#8203;927](pypa/packaging#927)
- Changed static type annotations in prereleases setter method in `specifier.py` by [@&#8203;subhajitsaha01](https://github.com/subhajitsaha01) in [#&#8203;930](pypa/packaging#930)
- Statically type the tests by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;982](pypa/packaging#982)

Internal:

- Test and declare support Python 3.14 by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;901](pypa/packaging#901)
- Modernize and speed up tests on Python 3.14 by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;903](pypa/packaging#903)
- Change our license metadata to use an SPDX license expression by [@&#8203;cdce8p](https://github.com/cdce8p) in [#&#8203;881](pypa/packaging#881)
- No need for `license-files` by [@&#8203;DimitriPapadopoulos](https://github.com/DimitriPapadopoulos) in [#&#8203;924](pypa/packaging#924)
- Update mypy by [@&#8203;hauntsaninja](https://github.com/hauntsaninja) in [#&#8203;891](pypa/packaging#891)
- Some config updates by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;902](pypa/packaging#902)
- Add spell check and rst check by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;904](pypa/packaging#904)
- Clean up ruff ignores by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;905](pypa/packaging#905)
- Update example for env marker `python_version` by [@&#8203;trim21](https://github.com/trim21) in [#&#8203;908](pypa/packaging#908)
- Move codespell configuration into pyproject.toml by [@&#8203;yarikoptic](https://github.com/yarikoptic) in [#&#8203;910](pypa/packaging#910)
- Check warning a little more precisely by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;837](pypa/packaging#837)
- Speed up mypy a little by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;836](pypa/packaging#836)
- Apply ruff/flake8-pyi rules (PYI) by [@&#8203;DimitriPapadopoulos](https://github.com/DimitriPapadopoulos) in [#&#8203;835](pypa/packaging#835)
- Better local runs for codespell by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;911](pypa/packaging#911)
- Remove outdated/confusing Gist link by [@&#8203;stefan6419846](https://github.com/stefan6419846) in [#&#8203;921](pypa/packaging#921)
- Fix docs and docs ci after [#&#8203;897](pypa/packaging#897) landed by [@&#8203;notatallshaw](https://github.com/notatallshaw) in [#&#8203;926](pypa/packaging#926)
- Run twine-check on push in CI by [@&#8203;EpicWink](https://github.com/EpicWink) in [#&#8203;922](pypa/packaging#922)
- `ruff` was renamed `ruff-check` in pre-commit by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;933](pypa/packaging#933)
- Fix incorrectly implicitly concatenated string in specifiers test by [@&#8203;notatallshaw](https://github.com/notatallshaw) in [#&#8203;946](pypa/packaging#946)
- Simplify conditional by [@&#8203;ofek](https://github.com/ofek) in [#&#8203;949](pypa/packaging#949)
- Modernize nox, use dependency-groups for tests by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;952](pypa/packaging#952)
- Add more checks that don't affect anything by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;957](pypa/packaging#957)
- Enable Ruff ISC rule by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;959](pypa/packaging#959)
- Ruff code FLY by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;963](pypa/packaging#963)
- pytest `log_level` is better than `log_cli_level` by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;956](pypa/packaging#956)
- Ruff code TRY by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;961](pypa/packaging#961)
- Add the ruff PL checks by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;964](pypa/packaging#964)
- Enable Ruff ARG rules by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;958](pypa/packaging#958)
- Ruff PT code (pytest) by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;960](pypa/packaging#960)
- Add ruff DTZ by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;968](pypa/packaging#968)
- Add ruff BLE by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;967](pypa/packaging#967)
- Add the ruff SIM checks by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;966](pypa/packaging#966)
- Adding ruff PERF by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;969](pypa/packaging#969)
- Move some config into coverage config by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;971](pypa/packaging#971)
- Check ruff C4 by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;962](pypa/packaging#962)
- Adding ruff T20 by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;972](pypa/packaging#972)
- Add a tests pass job by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;977](pypa/packaging#977)
- Add ruff TC by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;980](pypa/packaging#980)
- Adding part of ruff RET by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;979](pypa/packaging#979)
- Reorder mypy check by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;983](pypa/packaging#983)
- Enable ruff ALL by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;984](pypa/packaging#984)
- Link back to repo/source in furo by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;991](pypa/packaging#991)
- Add case insensitivity tests for arbitrary equality by [@&#8203;notatallshaw](https://github.com/notatallshaw) in [#&#8203;975](pypa/packaging#975)
- Synchronize documentation and code for markers by [@&#8203;zahlman](https://github.com/zahlman) in [#&#8203;1008](pypa/packaging#1008)
- Use `partition` in `_parse_project_urls` by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1013](pypa/packaging#1013)
- auto-skip the dependabot PRs in the release changelog generation by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1016](pypa/packaging#1016)
- Update unreleased section in changelog by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1017](pypa/packaging#1017)
- Fix PR role to match extlinks by [@&#8203;hugovk](https://github.com/hugovk) in [#&#8203;1020](pypa/packaging#1020)
- Mention new parts in README by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1023](pypa/packaging#1023)
- Replace a couple of asserts with else by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1027](pypa/packaging#1027)
- Simplify and/or check a little more by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1031](pypa/packaging#1031)
- Use slim runner for all check by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1021](pypa/packaging#1021)
- Use typos instead of codespell by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1015](pypa/packaging#1015)
- Update changelog with recent additions by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1034](pypa/packaging#1034)
- Publish to PyPI via GitHub CI by [@&#8203;EpicWink](https://github.com/EpicWink) in [#&#8203;893](pypa/packaging#893)
- Use prek for faster pre-commit lint step by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1037](pypa/packaging#1037)
- Add help text to noxfile by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1038](pypa/packaging#1038)
- Update licenses to 3.27 by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1036](pypa/packaging#1036)
- Use relative import in `packaging.licenses` by [@&#8203;notatallshaw](https://github.com/notatallshaw) in [#&#8203;1039](pypa/packaging#1039)
- Add zizmor and tighten up CI by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1035](pypa/packaging#1035)
- Fix release script by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1040](pypa/packaging#1040)
- Fix using a dev version (again) by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1041](pypa/packaging#1041)
- Fix type hint of function used with `contextlib.contextmanager` by [@&#8203;SpecLad](https://github.com/SpecLad) in [#&#8203;1046](pypa/packaging#1046)
- Always run tests by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1044](pypa/packaging#1044)
- Fix a changelog number by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1042](pypa/packaging#1042)
- Fix the publish job by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1043](pypa/packaging#1043)
- Get the correct tag on publish by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1045](pypa/packaging#1045)
- Test on first public release of CPython 3.11 and newer by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1056](pypa/packaging#1056)
- Fix publication job (again) by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1051](pypa/packaging#1051)
- Use `actionlint` to check CI workflows by [@&#8203;miketheman](https://github.com/miketheman) in [#&#8203;1052](pypa/packaging#1052)
- Fix formatting of distribution types in metadata.rst by [@&#8203;brettcannon](https://github.com/brettcannon) in [#&#8203;1053](pypa/packaging#1053)

#### New Contributors

- [@&#8203;cdce8p](https://github.com/cdce8p) made their first contribution in [#&#8203;881](pypa/packaging#881)
- [@&#8203;dholth](https://github.com/dholth) made their first contribution in [#&#8203;860](pypa/packaging#860)
- [@&#8203;trim21](https://github.com/trim21) made their first contribution in [#&#8203;908](pypa/packaging#908)
- [@&#8203;yarikoptic](https://github.com/yarikoptic) made their first contribution in [#&#8203;910](pypa/packaging#910)
- [@&#8203;cthoyt](https://github.com/cthoyt) made their first contribution in [#&#8203;868](pypa/packaging#868)
- [@&#8203;bwoodsend](https://github.com/bwoodsend) made their first contribution in [#&#8203;879](pypa/packaging#879)
- [@&#8203;stefan6419846](https://github.com/stefan6419846) made their first contribution in [#&#8203;921](pypa/packaging#921)
- [@&#8203;bearomorphism](https://github.com/bearomorphism) made their first contribution in [#&#8203;913](pypa/packaging#913)
- [@&#8203;EpicWink](https://github.com/EpicWink) made their first contribution in [#&#8203;922](pypa/packaging#922)
- [@&#8203;Liam-DeVoe](https://github.com/Liam-DeVoe) made their first contribution in [#&#8203;932](pypa/packaging#932)
- [@&#8203;subhajitsaha01](https://github.com/subhajitsaha01) made their first contribution in [#&#8203;930](pypa/packaging#930)
- [@&#8203;ncoghlan](https://github.com/ncoghlan) made their first contribution in [#&#8203;973](pypa/packaging#973)
- [@&#8203;zahlman](https://github.com/zahlman) made their first contribution in [#&#8203;1008](pypa/packaging#1008)
- [@&#8203;JP-Ellis](https://github.com/JP-Ellis) made their first contribution in [#&#8203;939](pypa/packaging#939)

#### Since last RC

Fixes:

- Restore `._version` as a compat shim by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1062](pypa/packaging#1062)

Performance:

- Dual replace by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1064](pypa/packaging#1064)

Documentaiton:

- Prepare for 26.0 final by [@&#8203;henryiii](https://github.com/henryiii) in [#&#8203;1063](pypa/packaging#1063)

**Full Changelog**: <pypa/packaging@26.0rc3...26.0>

</details>

---

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