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perf(linter): eliminate Vec allocation in disable directive matching#20387

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perf/linter-disable-directives-no-vec
Mar 15, 2026
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perf(linter): eliminate Vec allocation in disable directive matching#20387
graphite-app[bot] merged 1 commit intomainfrom
perf/linter-disable-directives-no-vec

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@Boshen Boshen commented Mar 14, 2026

Summary

  • Replace collect-then-iterate pattern with a single for-loop in contains()
  • Eliminates intermediate Vec<DisabledRule> allocation and double-clone per match
  • Each matched rule is now cloned once instead of twice

🤖 Generated with Claude Code

Copilot AI review requested due to automatic review settings March 14, 2026 15:57
@Boshen Boshen requested a review from camc314 as a code owner March 14, 2026 15:57
@github-actions github-actions bot added A-linter Area - Linter C-performance Category - Solution not expected to change functional behavior, only performance labels Mar 14, 2026
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Pull request overview

Optimizes disable-directive matching in the Rust linter by removing an intermediate Vec allocation and collapsing a collect-then-iterate flow into a single pass over matching intervals.

Changes:

  • Replaces find(..).filter(..).map(..).collect() with a single for loop over intervals.
  • Avoids allocating Vec<DisabledRule> and reduces per-match cloning (now one clone per matched directive).
  • Tracks match existence via a has_match boolean instead of !matched_intervals.is_empty().

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@Boshen Boshen self-assigned this Mar 14, 2026
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codspeed-hq bot commented Mar 14, 2026

Merging this PR will not alter performance

✅ 4 untouched benchmarks
⏩ 52 skipped benchmarks1


Comparing perf/linter-disable-directives-no-vec (e03ec29) with main (e62524d)

Open in CodSpeed

Footnotes

  1. 52 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports.

@Boshen Boshen added the 0-merge Merge with Graphite Merge Queue label Mar 15, 2026
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Boshen commented Mar 15, 2026

Merge activity

…20387)

## Summary
- Replace collect-then-iterate pattern with a single for-loop in `contains()`
- Eliminates intermediate `Vec<DisabledRule>` allocation and double-clone per match
- Each matched rule is now cloned once instead of twice

🤖 Generated with [Claude Code](https://claude.com/claude-code)
@graphite-app graphite-app bot force-pushed the perf/linter-disable-directives-no-vec branch from e03ec29 to 4a67f1d Compare March 15, 2026 02:01
@graphite-app graphite-app bot merged commit 4a67f1d into main Mar 15, 2026
21 checks passed
@graphite-app graphite-app bot deleted the perf/linter-disable-directives-no-vec branch March 15, 2026 02:06
@graphite-app graphite-app bot removed the 0-merge Merge with Graphite Merge Queue label Mar 15, 2026
camc314 pushed a commit that referenced this pull request Mar 16, 2026
# Oxlint
### 🚀 Features

- c95951f linter/plugins: Implement `sourceCode.markVariableAsUsed` (#20357) (overlookmotel)
- 7a2a7d0 linter: Implement `n/handle-callback-err` rule (#19616) (Mikhail Baev)

### 🐛 Bug Fixes

- f8fbd6e linter/plugins: Remove `hashbang` property from AST (#20365) (overlookmotel)
- 6eb5b01 linter/prefer-await-to-then: Ignore Promise static methods (#20347) (camc314)
- a4b61f7 linter: Remove `defineConfig` check (#20308) (camc314)
- 3ad7f53 linter/explicit-module-boundary-types: False positive with satisfies expr (#20309) (camc314)
- f547401 linter/no-unused-private-class-members: Treat switch discriminants as read (#20307) (camc314)
- 1c07b3b diagnostics: Handle `WouldBlock` in stdout writes to prevent panic (#20295) (Boshen)

### ⚡ Performance

- e4f7248 linter: Remove unnecessary clone of owned String in drain loop (#20388) (Boshen)
- 4a67f1d linter: Eliminate Vec allocation in disable directive matching (#20387) (Boshen)
- 618a598 linter/plugins: Add fast path for files with no comments (#20366) (overlookmotel)
- b0125c5 linter/plugins: Deserialize comments without AST (#20364) (overlookmotel)
- 9cd612f linter/plugins: Recycle comment objects (#20362) (overlookmotel)
- bf442f8 linter/plugins: Cheaper `Token` creation (#20360) (overlookmotel)
- 5474d0a semantic: V8-style walk-up reference resolution (#20292) (Boshen)
- 7946eba linter/plugins: Avoid arguments spread and temp array when merging (#20318) (overlookmotel)
- fc7cf8a linter/plugins: Pre-define less CFG merger functions (#20317) (overlookmotel)
- 3b9eb28 linter/plugins: Streamline getting/creating visit fn mergers (#20319) (overlookmotel)
- f04e850 linter/plugins: Inline binary search functions into call sites (#20312) (overlookmotel)
- fe24afe linter/plugins: Apply replace globals TSDown plugin to JS files (#20305) (overlookmotel)
- 77cdacc linter/plugins: Use array buffer views for tokens (#20301) (overlookmotel)
- 910c941 linter/plugins: Reorder branches in `getTokenByRangeStart` (#20296) (overlookmotel)
- af7674c linter/tokens: Avoid extra token value allocation (#20013) (camc314)

### 📚 Documentation

- 24490b5 linter: Improve formatting for 80ish rules' docs. (#20411) (connorshea)
- 3383523 linter: Improve `--tsconfig` flag docs (#20342) (camc314)
# Oxfmt
### 🚀 Features

- d22c443 oxfmt: Export `OxfmtConfig` type (#20275) (leaysgur)
- a11ecff oxfmt/lsp: Respect `angular` language id as `.component.html` file (#20242) (Sysix)

### 🐛 Bug Fixes

- ce65099 formatter: Preserve parentheses around as expression before private field access (#20419) (bab)
- f908742 oxfmt: Revert #20326 partially (#20413) (leaysgur)
- 4ef93ea formatter: Honor trailing ignore comments after list separators (#19925) (Andreas Lubbe)
- 68fb0d0 oxfmt: Skip vite.config.ts which fails to import (#20326) (leaysgur)
- 88ee826 oxfmt: Handle literalline for script-in-vue (#20130) (leaysgur)
- 1c07b3b diagnostics: Handle `WouldBlock` in stdout writes to prevent panic (#20295) (Boshen)

Co-authored-by: Boshen <1430279+Boshen@users.noreply.github.com>
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