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perf(linter/expect-expect): avoid recompiling matches on every traversal#23593

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perf(linter/expect-expect): avoid recompiling matches on every traversal#23593
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@camc314 camc314 commented Jun 18, 2026

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  • Speed up jest/expect-expect by compiling configured assertion matchers once during rule configuration instead of rebuilding regexes while walking each test body.

  • Add a fast exact-name matcher for common assertion names like expect, while preserving wildcard pattern behavior for custom assertFunctionNames.

  • The previous hot path converted assertion names into regex strings and compiled regexes during each candidate test traversal.

  • On a synthetic stress fixture with 1,000 tests and 50,000 non-assertion calls, --debug timings showed jest/expect-expect dropping from about ~7400 ms to ~60 ms with the same 3000 rule invocations.

  • The rule now stores precomputed Jest/Vitest assertion matchers on ExpectExpectConfig, so per-call work is reduced to exact string matching or a reused regex match.

fixes #23592

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@github-actions github-actions Bot added the A-linter Area - Linter label Jun 18, 2026
@camc314 camc314 self-assigned this Jun 18, 2026
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Merging this PR will not alter performance

✅ 5 untouched benchmarks
⏩ 66 skipped benchmarks1


Comparing c/expect-expect-perf (a06eb6b) with main (6d56d57)

Open in CodSpeed

Footnotes

  1. 66 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.

@camc314 camc314 added the 0-merge Merge with Graphite Merge Queue label Jun 18, 2026

camc314 commented Jun 18, 2026

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…sal (#23593)

- Speed up `jest/expect-expect` by compiling configured assertion matchers once during rule configuration instead of rebuilding regexes while walking each test body.
- Add a fast exact-name matcher for common assertion names like `expect`, while preserving wildcard pattern behavior for custom `assertFunctionNames`.

- The previous hot path converted assertion names into regex strings and compiled regexes during each candidate test traversal.
- On a synthetic stress fixture with 1,000 tests and 50,000 non-assertion calls, `--debug timings` showed `jest/expect-expect` dropping from about `~7400 ms` to `~60 ms` with the same `3000` rule invocations.
- The rule now stores precomputed Jest/Vitest assertion matchers on `ExpectExpectConfig`, so per-call work is reduced to exact string matching or a reused regex match.

fixes #23592
@graphite-app graphite-app Bot force-pushed the c/expect-expect-perf branch from a06eb6b to d5c7d99 Compare June 18, 2026 10:16
@graphite-app graphite-app Bot merged commit d5c7d99 into main Jun 18, 2026
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@graphite-app graphite-app Bot removed the 0-merge Merge with Graphite Merge Queue label Jun 18, 2026
@graphite-app graphite-app Bot deleted the c/expect-expect-perf branch June 18, 2026 10:20
Boshen added a commit that referenced this pull request Jun 22, 2026
# Oxlint
### 💥 BREAKING CHANGES

- 36009dd allocator: [**BREAKING**] `GetAllocator::allocator` take
`&self` (#23676) (overlookmotel)

### 🚀 Features

- ff65285 linter: `no-restricted-globals` add missing upstream options
(#23663) (Sysix)
- 7b8bd89 linter/typescript: Implement suggestion for
`no-unnecessary-type-constraint` rule (#23646) (Mikhail Baev)
- 0dc2405 linter: Add schema for `eslint/no-restricted-properties`
(#23619) (Sysix)
- b638d0e linter: Add schema for `node/callback-return` (#23615) (Sysix)
- eb8bedc linter: Add schema for `import/extensions` (#23557)
(WaterWhisperer)
- 46f3625 linter: Implement node/no-sync rule (#23589) (fujitani sora)
- b01739a linter: Add schema for `unicorn/numeric-separators-style`
(#23554) (Mikhail Baev)
- 68afd2a linter/node: Implement `no-mixed-requires` rule (#23539)
(fujitani sora)
- 59d8893 linter: `unicorn/numeric-separators-style` support missing
options (#23524) (Sysix)
- a421215 linter: Add schema for `eslint/prefer-destructuring` (#23410)
(WaterWhisperer)
- 84438be linter/jsdoc: Added missing options to
`require-param-description` (#23416) (kapobajza)
- c145b72 linter/jsdoc/require-param-type: Implement fixer (#23513)
(camc314)
- 51910df linter/jsdoc: Add missing options to `require-param-type` rule
(#23418) (kapobajza)
- e90925f linter/unicorn: Implement prefer-number-coercion rule (#23497)
(Shekhu☺️)
- dd1c866 linter/vue: Implement no-async-in-computed-properties rule
(#23493) (bab)
- b02444e linter: Add schema for `react/jsx-no-script-url` (#23475)
(WaterWhisperer)
- 53509a8 minifier: Treeshake pure typed arrays and Set/Map array
literals (#23469) (Dunqing)
- a8dce46 linter/unicorn: Implement `max-nested-calls` rule (#23461)
(arieleli01212)

### 🐛 Bug Fixes

- b1948a1 linter/radix: Avoid panic on `parseInt` with a spread radix
argument (#23623) (Jerry Zhao)
- f28ccfd linter/prefer-query-selector: Use a compound selector for
multiple classes (#23628) (Jerry Zhao)
- 13f2970 linter/prefer-numeric-literals: Avoid panic on `parseInt` with
a spread radix argument (#23624) (Jerry Zhao)
- 57612b3 linter: Report invalid capitalized-comments ignore patterns
(#23608) (camc314)
- 800ee2a linter/consistent-vitest-vi: Preserve import aliases when
rewriting the import (#23568) (Yunfei He)
- f78b5e1 linter/consistent-indexed-object-style: Don't leak a stray
comma into the value type (#23566) (Yunfei He)
- 6b104e8 linter/radix: Detect a trailing comma only after the argument
(#23569) (Yunfei He)
- 2de20cb linter/unicorn/prefer-at: Correct two-argument `slice().pop()`
index (#23565) (Yunfei He)
- de778ec linter: `unicorn/numeric-separators-style` preserve dot for
floats without decial part (#23553) (Sysix)
- 651027c linter/curly: Remove only the block's own braces (#23580)
(Yunfei He)
- 687e835 linter/array-type: Parenthesize a conditional-type element
(#23579) (Yunfei He)
- 9c80dff linter/unicorn/no-unnecessary-await: Don't paste operators
into invalid syntax (#23556) (Yunfei He)
- 46e1463 linter/no-compare-neg-zero: Delete the `-` of a parenthesized
`-0` (#23578) (Yunfei He)
- d172a97 linter/unicorn/prefer-math-trunk: Skip fixer for LHS with side
effects (#23548) (camc314)
- 1c3a9bd linter/unicorn/prefer-negative-index: Don't report
`Array#with` (#23518) (Yunfei He)
- c17db5d linter/unicorn/prefer-spread: Don't report `.slice()` on
non-array receivers (#23520) (Yunfei He)
- 9cd0c2f linter/unicorn/prefer-date-now: Keep `BigInt` wrapper when
fixing `BigInt(new Date())` (#23523) (Yunfei He)
- 16bb890 linter/unicorn/prefer-array-flat: Skip non-array `flatMap`
receivers (#23527) (Yunfei He)
- 3e6f90f linter/unicorn/no-zero-fractions: Insert a space after any
preceding keyword (#23529) (Yunfei He)
- 79a7d69 linter/eslint/no-useless-assignment: Handle exceptional
control-flow paths (#23544) (camc314)
- e8e2741 linter/unicorn/prefer-math-min-max: Preserve operand source
text in the fix (#23533) (Yunfei He)
- f592154 linter/react/display-name: Ignore lowercase jsx helpers
(#23510) (camc314)
- df7612f linter/jsx-a11y/no-noninteractive-element-to-interactive-role:
Allow custom roles config (#23507) (camc314)
- 924b931 linter/unicorn/prefer-at: Handle checking all indexes
correctly (#23504) (camc314)
- ca9686b linter/unicorn/prefer-at: Report zero indexes (#23503)
(camc314)
- e96a4e3 linter/unicorn/explicit-length-check: Ignore optional chains
(#23487) (camc314)
- a303c23 linter/jsx-a11y: Align `anchor-is-valid` config with upstream
(#23446) (camc314)
- f27a6d1 linter: False positives with non `*.setTimeout` call in
`no-confusing-set-timeout` (#23444) (camc314)

### ⚡ Performance

- 8e0dd65 linter: Emit RuleEnum dispatch match once instead of per
timing branch (#23499) (Boshen)
- d5c7d99 linter/expect-expect: Avoid recompiling matches on every
traversal (#23593) (camc314)
- f191520 linter/no-useless-spread: Avoid collecting `Vec` before
iterating (#23546) (camc314)
- 79340d1 linter: Stream React lifecycle ancestors (#23545) (camc314)
- 1923169 linter/eslint/max-classes: Gate rule by rule config threshold
(#23509) (camc314)
- 3f60de3 linter: Use bucketed dispatch for all files (#23452) (camc314)
- 3699971
linter/typescript/no-unnecessary-parameter-property-assignment: Avoid
temporary vec allocations (#23492) (camc314)
- 4ef0ceb linter/eslint/no-useless-switch-case: Avoid temporary vec
allocations (#23489) (camc314)
- 2e09dd3 linter: Avoid JSX fragment child collections (#23486)
(camc314)
- f30a64c linter/oxc/branches-sharing-code: Borrow shared branch
suggestion text (#23484) (camc314)
- 097a317 linter/eslint/no-control-regex: Retain control regex
candidates in place (#23482) (camc314)
- b3a093d linter: Reuse rule dispatch buckets (#23450) (camc314)
- 9f1a985 oxlint: Start Tokio only for LSP (#23447) (camc314)

### 📚 Documentation

- 9e219de linter/plugins: Update usage instruction (#23495) (Tony)
- b50bf4d linter: Remove manually written options doc for
`eslint/arrow-body-style` (#23490) (Mikhail Baev)
# Oxfmt
### 💥 BREAKING CHANGES

- 36009dd allocator: [**BREAKING**] `GetAllocator::allocator` take
`&self` (#23676) (overlookmotel)

### 🐛 Bug Fixes

- f21ed2c formatter_json: Normalize CRLF for suppressed text (#23702)
(leaysgur)
- 7cd1737 formatter: Normalize CRLF for suppressed text (#23701)
(leaysgur)
- a36e444 formatter: Member chain panic when tail is merged with comment
in dev build (#23698) (leaysgur)
- 600d306 formatter: Preserve parens with default export and type cast
(#23697) (leaysgur)
- 61290f2 formatter: Single-member intersection/union type with comment
formatting (#21915) (Leonabcd123)
- 5a1b0b4 formatter: Parenthesize a type assertion used as the base of
`**` (#23633) (Jerry Zhao)
- 91827e2 formatter: Use `Ordering::reverse()` with `order: desc` for
idempotency (#23543) (leaysgur)
- 8fa7394 formatter_json: Handle wrapped error span (#23472) (leaysgur)
- 37a34a1 oxfmt/lsp: Avoid newlines line ending changes (#23463) (Sysix)

### ⚡ Performance

- 80f1697 formatter: Avoid arena copy for already-lowercase bigint
literals (#23534) (Yunfei He)
- 1a40b71 formatter: Avoid arena copy for borrowed numeric-literal text
(#23512) (Yunfei He)
- 12e4451 formatter: Avoid arena copy for borrowed string-literal text
(#23465) (Yunfei He)

Co-authored-by: Boshen <1430279+Boshen@users.noreply.github.com>
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perf(linter): jest/expect-expect rule is excessively slow

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