perf: tiny import time improvement and simplification#1047
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perf: tiny import time improvement and simplification#1047
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Signed-off-by: Henry Schreiner <henryfs@princeton.edu>
notatallshaw
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Jan 10, 2026
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Yeah, this version is impressively simple, I hadn't thought of it. |
radermacher-iits
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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 [@​sbidoul](https://github.com/sbidoul) in [#​900](pypa/packaging#900) - PEP 794: import name metadata by [@​brettcannon](https://github.com/brettcannon) in [#​948](pypa/packaging#948) - Support writing metadata by [@​henryiii](https://github.com/henryiii) in [#​846](pypa/packaging#846) - Support `__replace__` for `Version` by [@​henryiii](https://github.com/henryiii) in [#​1003](pypa/packaging#1003) - Support positional pattern matching for `Version` and `Specifier` by [@​henryiii](https://github.com/henryiii) in [#​1004](pypa/packaging#1004) Behavior adaptations: - PEP 440 handling of prereleases for `Specifier.contains`, `SpecifierSet.contains`, and `SpecifierSet.filter` by [@​notatallshaw](https://github.com/notatallshaw) in [#​897](pypa/packaging#897) - Handle PEP 440 edge case in `SpecifierSet.filter` by [@​notatallshaw](https://github.com/notatallshaw) in [#​942](pypa/packaging#942) - Adjust arbitrary equality intersection preservation in `SpecifierSet` by [@​notatallshaw](https://github.com/notatallshaw) in [#​951](pypa/packaging#951) - Return `False` instead of raising for `.contains` with invalid version by [@​Liam-DeVoe](https://github.com/Liam-DeVoe) in [#​932](pypa/packaging#932) - Support arbitrary equality on arbitrary strings for `Specifier` and `SpecifierSet`'s `filter` and `contains` method. by [@​notatallshaw](https://github.com/notatallshaw) in [#​954](pypa/packaging#954) - Only try to parse as `Version` on certain marker keys, return `False` on unequal ordered comparsions by [@​JP-Ellis](https://github.com/JP-Ellis) in [#​939](pypa/packaging#939) Fixes: - Update `_hash` when unpickling `Tag()` by [@​dholth](https://github.com/dholth) in [#​860](pypa/packaging#860) - Correct comment and simplify implicit prerelease handling in `Specifier.prereleases` by [@​notatallshaw](https://github.com/notatallshaw) in [#​896](pypa/packaging#896) - Use explicit `_GLibCVersion` `NamedTuple` in `_manylinux` by [@​cthoyt](https://github.com/cthoyt) in [#​868](pypa/packaging#868) - Detect invalid license expressions containing `()` by [@​bwoodsend](https://github.com/bwoodsend) in [#​879](pypa/packaging#879) - Correct regex for metadata `'name'` format by [@​di](https://github.com/di) in [#​925](pypa/packaging#925) - Improve the message around expecting a semicolon by [@​pradyunsg](https://github.com/pradyunsg) in [#​833](pypa/packaging#833) - Support nested parens in license expressions by [@​Liam-DeVoe](https://github.com/Liam-DeVoe) in [#​931](pypa/packaging#931) - Add space before at symbol in `Requirements` string by [@​henryiii](https://github.com/henryiii) in [#​953](pypa/packaging#953) - A root logger use found by ruff LOG, use `packaging` logger instead by [@​henryiii](https://github.com/henryiii) in [#​965](pypa/packaging#965) - Better support for subclassing `Marker` and `Requirement` by [@​henryiii](https://github.com/henryiii) in [#​1022](pypa/packaging#1022) - Normalize all extras, not just if it comes first by [@​henryiii](https://github.com/henryiii) in [#​1024](pypa/packaging#1024) - Don't produce a broken repr if `Marker` fails to construct by [@​henryiii](https://github.com/henryiii) in [#​1033](pypa/packaging#1033) Performance: - Avoid recompiling regexes in the tokenizer for a 3x speedup by [@​hauntsaninja](https://github.com/hauntsaninja) in [#​1019](pypa/packaging#1019) - Improve performance in `_manylinux.py` by [@​cthoyt](https://github.com/cthoyt) in [#​869](pypa/packaging#869) - Minor cleanups to `Version` by [@​bearomorphism](https://github.com/bearomorphism) in [#​913](pypa/packaging#913) - Skip redundant creation of `Version`s in specifier comparison by [@​notatallshaw](https://github.com/notatallshaw) in [#​986](pypa/packaging#986) - Cache `Specifier`'s Version by [@​notatallshaw](https://github.com/notatallshaw) in [#​985](pypa/packaging#985) - Make `Version` a little faster by [@​henryiii](https://github.com/henryiii) in [#​987](pypa/packaging#987) - Minor `Version` regex cleanup by [@​henryiii](https://github.com/henryiii) in [#​990](pypa/packaging#990) - Faster regex on Python 3.11.5+ by [@​henryiii](https://github.com/henryiii) in [#​988](pypa/packaging#988) and [#​1055](pypa/packaging#1055) - Lazily calculate `_key` in `Version` by [@​notatallshaw](https://github.com/notatallshaw) in [#​989](pypa/packaging#989) and regression for `packaging_legacy` fixed by [@​henryiii](https://github.com/henryiii) in [#​1048](pypa/packaging#1048) - Faster `canonicalize_version` by [@​henryiii](https://github.com/henryiii) in [#​993](pypa/packaging#993) - Use `fullmatch` in a couple more places by [@​henryiii](https://github.com/henryiii) in [#​992](pypa/packaging#992) - Use `fullmatch` for markers too by [@​henryiii](https://github.com/henryiii) in [#​1029](pypa/packaging#1029) - Use `map` instead of generator by [@​henryiii](https://github.com/henryiii) in [#​996](pypa/packaging#996) - Deprecate `._version` (`_Version`, a `NamedTuple`) by [@​henryiii](https://github.com/henryiii) in [#​995](pypa/packaging#995) and [#​1062](pypa/packaging#1062) - Avoid duplicate `Version` creation in `canonicalize_version` by [@​henryiii](https://github.com/henryiii) in [#​994](pypa/packaging#994) - Add `__slots__` to `Version` by [@​henryiii](https://github.com/henryiii) in [#​1001](pypa/packaging#1001) - Add `__slots__` to `Specifier`s by [@​henryiii](https://github.com/henryiii) in [#​1002](pypa/packaging#1002) - Add `__slots__` to `Node`s by [@​henryiii](https://github.com/henryiii) in [#​1032](pypa/packaging#1032) - Use `version.__replace__` in specifier comparison by [@​notatallshaw](https://github.com/notatallshaw) in [#​999](pypa/packaging#999) - Use `_get_spec_version` in more places in `Specifier` by [@​notatallshaw](https://github.com/notatallshaw) in [#​1005](pypa/packaging#1005) - Pull `set` construction out of function by [@​henryiii](https://github.com/henryiii) in [#​1012](pypa/packaging#1012) - Letter normalization dict for prereleases and the like by [@​henryiii](https://github.com/henryiii) in [#​1014](pypa/packaging#1014) - Avoid normalizing extras again when comparing by [@​henryiii](https://github.com/henryiii) in [#​1028](pypa/packaging#1028) - Speed up `Version.__str__` by about 10% by [@​henryiii](https://github.com/henryiii) in [#​997](pypa/packaging#997) - Increase the performance of `canonicalize_name` by avoiding a regex by [@​henryiii](https://github.com/henryiii) in [#​1030](pypa/packaging#1030), [#​1047](pypa/packaging#1047), and [#​1064](pypa/packaging#1064) - Faster zero stripping by [@​henryiii](https://github.com/henryiii) in [#​1058](pypa/packaging#1058) Type annotations: - Fix a type annotation by [@​brettcannon](https://github.com/brettcannon) in [#​907](pypa/packaging#907) - Fix tags return type in `parse_wheel_filename` docs by [@​ncoghlan](https://github.com/ncoghlan) in [#​973](pypa/packaging#973) - Add type hint for `_version` in `.version.Version` by [@​brettcannon](https://github.com/brettcannon) in [#​927](pypa/packaging#927) - Changed static type annotations in prereleases setter method in `specifier.py` by [@​subhajitsaha01](https://github.com/subhajitsaha01) in [#​930](pypa/packaging#930) - Statically type the tests by [@​henryiii](https://github.com/henryiii) in [#​982](pypa/packaging#982) Internal: - Test and declare support Python 3.14 by [@​henryiii](https://github.com/henryiii) in [#​901](pypa/packaging#901) - Modernize and speed up tests on Python 3.14 by [@​henryiii](https://github.com/henryiii) in [#​903](pypa/packaging#903) - Change our license metadata to use an SPDX license expression by [@​cdce8p](https://github.com/cdce8p) in [#​881](pypa/packaging#881) - No need for `license-files` by [@​DimitriPapadopoulos](https://github.com/DimitriPapadopoulos) in [#​924](pypa/packaging#924) - Update mypy by [@​hauntsaninja](https://github.com/hauntsaninja) in [#​891](pypa/packaging#891) - Some config updates by [@​henryiii](https://github.com/henryiii) in [#​902](pypa/packaging#902) - Add spell check and rst check by [@​henryiii](https://github.com/henryiii) in [#​904](pypa/packaging#904) - Clean up ruff ignores by [@​henryiii](https://github.com/henryiii) in [#​905](pypa/packaging#905) - Update example for env marker `python_version` by [@​trim21](https://github.com/trim21) in [#​908](pypa/packaging#908) - Move codespell configuration into pyproject.toml by [@​yarikoptic](https://github.com/yarikoptic) in [#​910](pypa/packaging#910) - Check warning a little more precisely by [@​henryiii](https://github.com/henryiii) in [#​837](pypa/packaging#837) - Speed up mypy a little by [@​henryiii](https://github.com/henryiii) in [#​836](pypa/packaging#836) - Apply ruff/flake8-pyi rules (PYI) by [@​DimitriPapadopoulos](https://github.com/DimitriPapadopoulos) in [#​835](pypa/packaging#835) - Better local runs for codespell by [@​henryiii](https://github.com/henryiii) in [#​911](pypa/packaging#911) - Remove outdated/confusing Gist link by [@​stefan6419846](https://github.com/stefan6419846) in [#​921](pypa/packaging#921) - Fix docs and docs ci after [#​897](pypa/packaging#897) landed by [@​notatallshaw](https://github.com/notatallshaw) in [#​926](pypa/packaging#926) - Run twine-check on push in CI by [@​EpicWink](https://github.com/EpicWink) in [#​922](pypa/packaging#922) - `ruff` was renamed `ruff-check` in pre-commit by [@​henryiii](https://github.com/henryiii) in [#​933](pypa/packaging#933) - Fix incorrectly implicitly concatenated string in specifiers test by [@​notatallshaw](https://github.com/notatallshaw) in [#​946](pypa/packaging#946) - Simplify conditional by [@​ofek](https://github.com/ofek) in [#​949](pypa/packaging#949) - Modernize nox, use dependency-groups for tests by [@​henryiii](https://github.com/henryiii) in [#​952](pypa/packaging#952) - Add more checks that don't affect anything by [@​henryiii](https://github.com/henryiii) in [#​957](pypa/packaging#957) - Enable Ruff ISC rule by [@​henryiii](https://github.com/henryiii) in [#​959](pypa/packaging#959) - Ruff code FLY by [@​henryiii](https://github.com/henryiii) in [#​963](pypa/packaging#963) - pytest `log_level` is better than `log_cli_level` by [@​henryiii](https://github.com/henryiii) in [#​956](pypa/packaging#956) - Ruff code TRY by [@​henryiii](https://github.com/henryiii) in [#​961](pypa/packaging#961) - Add the ruff PL checks by [@​henryiii](https://github.com/henryiii) in [#​964](pypa/packaging#964) - Enable Ruff ARG rules by [@​henryiii](https://github.com/henryiii) in [#​958](pypa/packaging#958) - Ruff PT code (pytest) by [@​henryiii](https://github.com/henryiii) in [#​960](pypa/packaging#960) - Add ruff DTZ by [@​henryiii](https://github.com/henryiii) in [#​968](pypa/packaging#968) - Add ruff BLE by [@​henryiii](https://github.com/henryiii) in [#​967](pypa/packaging#967) - Add the ruff SIM checks by [@​henryiii](https://github.com/henryiii) in [#​966](pypa/packaging#966) - Adding ruff PERF by [@​henryiii](https://github.com/henryiii) in [#​969](pypa/packaging#969) - Move some config into coverage config by [@​henryiii](https://github.com/henryiii) in [#​971](pypa/packaging#971) - Check ruff C4 by [@​henryiii](https://github.com/henryiii) in [#​962](pypa/packaging#962) - Adding ruff T20 by [@​henryiii](https://github.com/henryiii) in [#​972](pypa/packaging#972) - Add a tests pass job by [@​henryiii](https://github.com/henryiii) in [#​977](pypa/packaging#977) - Add ruff TC by [@​henryiii](https://github.com/henryiii) in [#​980](pypa/packaging#980) - Adding part of ruff RET by [@​henryiii](https://github.com/henryiii) in [#​979](pypa/packaging#979) - Reorder mypy check by [@​henryiii](https://github.com/henryiii) in [#​983](pypa/packaging#983) - Enable ruff ALL by [@​henryiii](https://github.com/henryiii) in [#​984](pypa/packaging#984) - Link back to repo/source in furo by [@​henryiii](https://github.com/henryiii) in [#​991](pypa/packaging#991) - Add case insensitivity tests for arbitrary equality by [@​notatallshaw](https://github.com/notatallshaw) in [#​975](pypa/packaging#975) - Synchronize documentation and code for markers by [@​zahlman](https://github.com/zahlman) in [#​1008](pypa/packaging#1008) - Use `partition` in `_parse_project_urls` by [@​henryiii](https://github.com/henryiii) in [#​1013](pypa/packaging#1013) - auto-skip the dependabot PRs in the release changelog generation by [@​henryiii](https://github.com/henryiii) in [#​1016](pypa/packaging#1016) - Update unreleased section in changelog by [@​henryiii](https://github.com/henryiii) in [#​1017](pypa/packaging#1017) - Fix PR role to match extlinks by [@​hugovk](https://github.com/hugovk) in [#​1020](pypa/packaging#1020) - Mention new parts in README by [@​henryiii](https://github.com/henryiii) in [#​1023](pypa/packaging#1023) - Replace a couple of asserts with else by [@​henryiii](https://github.com/henryiii) in [#​1027](pypa/packaging#1027) - Simplify and/or check a little more by [@​henryiii](https://github.com/henryiii) in [#​1031](pypa/packaging#1031) - Use slim runner for all check by [@​henryiii](https://github.com/henryiii) in [#​1021](pypa/packaging#1021) - Use typos instead of codespell by [@​henryiii](https://github.com/henryiii) in [#​1015](pypa/packaging#1015) - Update changelog with recent additions by [@​henryiii](https://github.com/henryiii) in [#​1034](pypa/packaging#1034) - Publish to PyPI via GitHub CI by [@​EpicWink](https://github.com/EpicWink) in [#​893](pypa/packaging#893) - Use prek for faster pre-commit lint step by [@​henryiii](https://github.com/henryiii) in [#​1037](pypa/packaging#1037) - Add help text to noxfile by [@​henryiii](https://github.com/henryiii) in [#​1038](pypa/packaging#1038) - Update licenses to 3.27 by [@​henryiii](https://github.com/henryiii) in [#​1036](pypa/packaging#1036) - Use relative import in `packaging.licenses` by [@​notatallshaw](https://github.com/notatallshaw) in [#​1039](pypa/packaging#1039) - Add zizmor and tighten up CI by [@​henryiii](https://github.com/henryiii) in [#​1035](pypa/packaging#1035) - Fix release script by [@​henryiii](https://github.com/henryiii) in [#​1040](pypa/packaging#1040) - Fix using a dev version (again) by [@​henryiii](https://github.com/henryiii) in [#​1041](pypa/packaging#1041) - Fix type hint of function used with `contextlib.contextmanager` by [@​SpecLad](https://github.com/SpecLad) in [#​1046](pypa/packaging#1046) - Always run tests by [@​henryiii](https://github.com/henryiii) in [#​1044](pypa/packaging#1044) - Fix a changelog number by [@​henryiii](https://github.com/henryiii) in [#​1042](pypa/packaging#1042) - Fix the publish job by [@​henryiii](https://github.com/henryiii) in [#​1043](pypa/packaging#1043) - Get the correct tag on publish by [@​henryiii](https://github.com/henryiii) in [#​1045](pypa/packaging#1045) - Test on first public release of CPython 3.11 and newer by [@​henryiii](https://github.com/henryiii) in [#​1056](pypa/packaging#1056) - Fix publication job (again) by [@​henryiii](https://github.com/henryiii) in [#​1051](pypa/packaging#1051) - Use `actionlint` to check CI workflows by [@​miketheman](https://github.com/miketheman) in [#​1052](pypa/packaging#1052) - Fix formatting of distribution types in metadata.rst by [@​brettcannon](https://github.com/brettcannon) in [#​1053](pypa/packaging#1053) #### New Contributors - [@​cdce8p](https://github.com/cdce8p) made their first contribution in [#​881](pypa/packaging#881) - [@​dholth](https://github.com/dholth) made their first contribution in [#​860](pypa/packaging#860) - [@​trim21](https://github.com/trim21) made their first contribution in [#​908](pypa/packaging#908) - [@​yarikoptic](https://github.com/yarikoptic) made their first contribution in [#​910](pypa/packaging#910) - [@​cthoyt](https://github.com/cthoyt) made their first contribution in [#​868](pypa/packaging#868) - [@​bwoodsend](https://github.com/bwoodsend) made their first contribution in [#​879](pypa/packaging#879) - [@​stefan6419846](https://github.com/stefan6419846) made their first contribution in [#​921](pypa/packaging#921) - [@​bearomorphism](https://github.com/bearomorphism) made their first contribution in [#​913](pypa/packaging#913) - [@​EpicWink](https://github.com/EpicWink) made their first contribution in [#​922](pypa/packaging#922) - [@​Liam-DeVoe](https://github.com/Liam-DeVoe) made their first contribution in [#​932](pypa/packaging#932) - [@​subhajitsaha01](https://github.com/subhajitsaha01) made their first contribution in [#​930](pypa/packaging#930) - [@​ncoghlan](https://github.com/ncoghlan) made their first contribution in [#​973](pypa/packaging#973) - [@​zahlman](https://github.com/zahlman) made their first contribution in [#​1008](pypa/packaging#1008) - [@​JP-Ellis](https://github.com/JP-Ellis) made their first contribution in [#​939](pypa/packaging#939) #### Since last RC Fixes: - Restore `._version` as a compat shim by [@​henryiii](https://github.com/henryiii) in [#​1062](pypa/packaging#1062) Performance: - Dual replace by [@​henryiii](https://github.com/henryiii) in [#​1064](pypa/packaging#1064) Documentaiton: - Prepare for 26.0 final by [@​henryiii](https://github.com/henryiii) in [#​1063](pypa/packaging#1063) **Full Changelog**: <pypa/packaging@26.0rc3...26.0> </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4zLjYiLCJ1cGRhdGVkSW5WZXIiOiI0My4zLjYiLCJ0YXJnZXRCcmFuY2giOiJtYXN0ZXIiLCJsYWJlbHMiOltdfQ==--> Reviewed-on: https://kubara.git.onstackit.cloud/STACKIT/kubara/pulls/280
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Followup to #1030, using @notatallshaw's suggestion, which I though would look more complicated until I saw @hugovk's version in python/cpython#143660. Should be slightly faster import time, and reads slightly better, IMO.