Repository navigation
Prefilter bidirectional Unicode checks by UTF-8 leading bytes - #29561
Merged
Merged
Conversation
MichaReiser
added
performance
MichaReiser
temporarily deployed
to
automations
October 20, 2026 23:19 — with 
GitHub Actions
Inactive
GitHub Actions
Inactive
|
MichaReiser
marked this pull request as ready for review
October 21, 2026 01:26
ntBre
approved these changes
Oct 21, 2026
rlichtenwalter
added a commit
to rlichtenwalter/dir2text
that referenced
this pull request
Oct 30, 2026
This PR contains the following updates: | Package | Type | Update | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) | |---|---|---|---|---|---| | [DavidAnson/markdownlint-cli2](https://github.com/DavidAnson/markdownlint-cli2) | repository | minor | `v0.23.3` → `v0.24.0` |  |  | | [ruff](https://docs.astral.sh/ruff) ([source](https://github.com/astral-sh/ruff), [changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)) | dependency-groups | patch | `==0.17.1` → `==0.17.3` |  |  | Note: The `pre-commit` manager in Renovate is not supported by the `pre-commit` maintainers or community. Please do not report any problems there, instead [create a Discussion in the Renovate repository](https://github.com/renovatebot/renovate/discussions/new) if you have any questions. --- ### Release Notes <details> <summary>DavidAnson/markdownlint-cli2</summary> ### [`v0.24.0`](DavidAnson/markdownlint-cli2@v0.23.3...v0.24.0) [Compare Source](DavidAnson/markdownlint-cli2@v0.23.3...v0.24.0) </details> <details> <summary>astral-sh/ruff (ruff)</summary> ### [`v0.17.3`](https://github.com/astral-sh/ruff/blob/HEAD/CHANGELOG.md#0173) [Compare Source](astral-sh/ruff@0.17.2...0.17.3) Released on 2026-10-26. ##### Preview features - \[`suspicious`] Add `shared-clock-mock` ([#​29074](astral-sh/ruff#29074)) ##### Bug fixes - \[`pyupgrade`] Avoid incorrect conversions to f-strings (`UP032`) ([#​25485](astral-sh/ruff#25485)) ##### Performance - Buffer stdout in `ruff format` ([#​29631](astral-sh/ruff#29631)) - Specialize ASCII identifier lexing ([#​29503](astral-sh/ruff#29503)) - Speed up identifier and keyword lexing ([#​29463](astral-sh/ruff#29463)) ##### Documentation - \[`flake8-bandit`] Describe what the rule actually checks for `httpx` (`S113`) ([#​27936](astral-sh/ruff#27936)) ##### Contributors - [@​itsvedantkumar](https://github.com/itsvedantkumar) - [@​charliermarsh](https://github.com/charliermarsh) - [@​anishgirianish](https://github.com/anishgirianish) ### [`v0.17.2`](https://github.com/astral-sh/ruff/blob/HEAD/CHANGELOG.md#0172) [Compare Source](astral-sh/ruff@0.17.1...0.17.2) Released on 2026-10-22. ##### Preview features - \[`complexity`] Add `unnecessary-regular-expression-compile` ([#​25533](astral-sh/ruff#25533)) ##### Bug fixes - Avoid syntax errors for type variables with starred constraints (`UP040`, `UP046`, `UP047`, `RUF053`) ([#​28362](astral-sh/ruff#28362)) - \[`pydocstyle`] Treat backslash-escaped `*args` and `**kwargs` as documented (`D417`) ([#​29536](astral-sh/ruff#29536)) - \[`pylint`] Avoid false positive on starred elements (`PLE0643`) ([#​29483](astral-sh/ruff#29483)) - \[`pylint`] Mark fixes unsafe when deleting comments (`PLR5501`, `PLW0120`) ([#​29414](astral-sh/ruff#29414)) - \[`pyupgrade`] Mark fix unsafe when deleting comments (`UP035`) ([#​29413](astral-sh/ruff#29413)) ##### Performance - Avoid intermediate names in lint name resolution ([#​29506](astral-sh/ruff#29506)) - Prefilter bidirectional Unicode checks by UTF-8 leading bytes ([#​29561](astral-sh/ruff#29561)) - Share postfix parsing and reduce expression copies ([#​29480](astral-sh/ruff#29480)) ##### Configuration - \[`pylint`] Add a configurable allowlist for `magic-value-comparison` (`PLR2004`) ([#​18961](astral-sh/ruff#18961)) ##### Documentation - Clarify documentation and correct stale guidance ([#​29374](astral-sh/ruff#29374)) - \[`pyupgrade`] Remove mentions of variance related to fix safety (`UP040`, `UP047`) ([#​29592](astral-sh/ruff#29592)) ##### Contributors - [@​fixfon](https://github.com/fixfon) - [@​MichaReiser](https://github.com/MichaReiser) - [@​zaniebot](https://github.com/zaniebot) - [@​FrancescoPezzella](https://github.com/FrancescoPezzella) - [@​anishgirianish](https://github.com/anishgirianish) - [@​rajveer3x](https://github.com/rajveer3x) - [@​charliermarsh](https://github.com/charliermarsh) - [@​LckyLike](https://github.com/LckyLke) - [@​DaniBodor](https://github.com/DaniBodor) </details> --- ### Configuration 📅 **Schedule**: (in timezone America/Denver) - Branch creation - Between 02:00 AM and 06:59 AM, only on Tuesday (`* 2-6 * * 2`) - 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. 👻 **Immortal**: This PR will be recreated if closed unmerged. Get [config help](https://github.com/renovatebot/renovate/discussions) if that's undesired. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate CLI](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0NC4xNDguMyIsInVwZGF0ZWRJblZlciI6IjQ0LjE0OC4zIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJyZW5vdmF0ZSJdfQ==--> Reviewed-on: https://git.lichtenwalter.site/rlichten/dir2text/pulls/100
1 task
This branch was previously deployed
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
Avoid decoding every character in
bidirectional-unicode(PLE2502) by scanning for the two possible UTF-8 leading bytes withmemchr2. Run the existing exact check only on the suffix starting at the first candidate.This is an optimization that CodSpeed suggested. I can't reproduce there 7% perf improvement, but running the benchmarks as walltime benchmarks show a decent improvement:
Test Plan
Validation: Linter library tests, Clippy, and file-scoped hooks passed.