perf(linter/exhaustive-deps): simplify the logic of checking if the identifier it is a dependency of hook by Dunqing · Pull Request #18350 · oxc-project/oxc

Dunqing · 2026-01-21T13:55:22Z

From what I understand from the logic, only variables declared at the component level should be dependencies; otherwise, they are normal variables outside of the component or inside the child scope.

import { useEffect } from "react";

Variable was declared outside the component scope

const id = crypto.randomUUID();
function MyComponent() {
  useEffect(() => {
    console.log(id);
  }, []);
  return <div />;
}

Variable was declared inside a child scope

function MyComponent() {
  useEffect(() => {
    const id = crypto.randomUUID();
    console.log(id);
  }, []);
  return <div />;
}

Variable was redeclared in the same scope (should add id to dependencies)

function MyComponent() {
  const id = crypto.randomUUID();
  useEffect(() => {
    const id = crypto.randomUUID();
    console.log(id);
  }, []);
  return <div />;
}

Only case 3) should add id into the dependencies.

So simplifying the logic to check declaration.scope_id() != component_scope_id is sufficient.

Performance

This should have a significant performance improvement as it avoids the unnecessary two loops. By checking the initial PR of this rule #7151, there are also no performance changes, so I guess there are no such cases in the benchmark files.

Dunqing · 2026-01-21T13:55:40Z

feat(semantic)!: remove Scoping::scope_build_child_ids and all related APIs #18362
feat(oxc)!: remove CompilerInterface::semantic_child_scope_ids #18361
refactor(minifier): turn off scope_tree_child_ids for SemanticBuilder #18241
perf(linter): turn off scope_build_child_ids for SemanticBuilder #18360
perf(linter/exhaustive-deps): simplify the logic of checking if the identifier it is a dependency of hook #18350 👈 (View in Graphite)
perf(linter/block-scoped-var): avoid iter_all_scope_child_ids by walking references/redeclarations scope ancestors #18335
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codspeed-hq · 2026-01-21T16:36:54Z

CodSpeed Performance Report

Merging this PR will not alter performance

_{Comparing 01-21-perf_linter_exhaustive-deps_simplify_the_logic_of_checking_if_the_identifier_it_is_a_dependency_of_hook (c5cb6d3) with 01-21-refactor_linter_block-scoped-var_avoid_iter_all_scope_child_ids_by_walking_references_redeclarations_scope_ancestors (b5802c6)}

Summary

✅ 4 untouched benchmarks
⏩ 41 skipped benchmarks¹

41 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. ↩

graphite-app · 2026-01-22T06:24:34Z

Merge activity

Jan 22, 6:24 AM UTC: Boshen added this pull request to the Graphite merge queue.
Jan 22, 6:39 AM UTC: Merged by the Graphite merge queue.

…dentifier it is a dependency of hook (#18350) From what I understand from the logic, only variables declared at the component level should be dependencies; otherwise, they are normal variables outside of the component or inside the child scope. import { useEffect } from "react"; 1. Variable was declared outside the component scope ```tsx const id = crypto.randomUUID(); function MyComponent() { useEffect(() => { console.log(id); }, []); return <div />; } ``` 2. Variable was declared inside a child scope ```tsx function MyComponent() { useEffect(() => { const id = crypto.randomUUID(); console.log(id); }, []); return <div />; } ``` 3. Variable was redeclared in the same scope (should add `id` to dependencies) ```tsx function MyComponent() { const id = crypto.randomUUID(); useEffect(() => { const id = crypto.randomUUID(); console.log(id); }, []); return <div />; } ``` Only case 3) should add `id` into the dependencies. So simplifying the logic to check `declaration.scope_id() != component_scope_id` is sufficient. ### Performance This should have a significant performance improvement as it avoids the unnecessary two loops. By checking the initial PR of this rule #7151, there are also no performance changes, so I guess there are no such cases in the benchmark files.

…18360) No use case in the linter after #18350 and #18335, so turn it off.

# Oxlint ### 💥 BREAKING CHANGES - 777fc40 ast: [**BREAKING**] Add `Ident` type (#18354) (Boshen) ### 🚀 Features - 34c3ec3 linter/prefer-logical-operator-over-ternary: Implement fixer (#18545) (camc314) - 019e0aa linter/valid-typeof: Add suggestions if type is misspelled (#18543) (camchenry) - 704c8eb linter/use-isnan: Add more specific error message for equality/inequality (#18542) (camchenry) - 1e99ace linter/use-isnan: Support more `indexOf` cases and improve diagnostic messages (#18537) (camchenry) - bffd134 linter/text-encoding-identifier-case: Add `withDash` option (#18533) (camc314) - 993fd2b parser: Parse unambiguous await with better error messages (#18480) (Boshen) - b4b6247 linter/plugins: `RuleTester` support settings (#18445) (overlookmotel) - 15d69dc linter: Implement react/display-name rule (#18426) (camchenry) - 2fbceae linter: Implement rule docs and config support for rules with tuple config options. (#18372) (connorshea) - 8db0e78 linter/plugins: Handle BOMs (#18376) (overlookmotel) - 6ac09e2 linter/plugins: Support source text not being at start of buffer (#18375) (overlookmotel) - fc3c86b linter: Update 125 rules to raise errors when provided with invalid config options. (#18104) (connorshea) - 2cc6ad2 linter/plugins: Add `ecmaFeatures` to `parserOptions` (#18313) (overlookmotel) ### 🐛 Bug Fixes - 2acf568 linter/plugins: Keep `Infinity` in rule default options (#18550) (overlookmotel) - 332d2ef linter/plugins: Add `jsx` property to `parserOptions.ecmaFeatures` (#18549) (overlookmotel) - 7d9bb1b linter: Update `eslint/func-names` to error on invalid rule config options, improve docs. (#18510) (connorshea) - 9c67974 linter: Improve the jsx-a11y/no-noninteractive-tabindex rule to match original rule logic better (#17848) (connorshea) - 75e7163 vscode: Support json5 for oxfmt (#18502) (Sysix) - c205b0d ast: Remove `ThisExpression` from `TSModuleReference` (#18489) (Boshen) - c51339a oxlint/lsp: Respect code action `source.fixAll` as an alias for `source.fixAll.oxc` (#18366) (Sysix) - 3c0e9b9 oxlint/lsp: Skip dangerous fixes/suggestions for "fix all" code action and command (#18364) (Sysix) - c44c093 linter: Fix behavior of unicorn/catch-error-name to match original rule (#18209) (connorshea) - 9c65aff linter/jsx-a11y: Change `no-autofocus` autofix to suggestion (#18155) (Ben Lowery) - 235c820 linter/unicorn: Fix `prefer-array-some` autofix for `.filter().length` pattern (#18153) (Ben Lowery) - a9925dc linter: Mark fixes in `unicorn/no-null` rule as dangerous. (#18436) (connorshea) - cee29b4 linter: Remove confusing scope from `react/only-export-components` rule diagnostics. (#18434) (connorshea) - aed3669 parser: Parse HTML-like comments in unambiguous mode (#18442) (Boshen) - b8a371d linter: Fix the path used in the gitlab format output (#18165) (connorshea) - e046ea6 linter: `vue/no-lifecycle-after-await` skip looking into arrow functions (#18302) (Sysix) - a9bfbcf linter: Compatibility issue with `DiagnosticData` type in ESLint (#18396) (루밀LuMir) - 10ab424 linter: `react/no_array_index_key` continue search for other attributes (#18409) (Lonami) - 9d776d4 linter: Update `import/no-cycle` rule to error on invalid config options. (#18330) (connorshea) - c163231 linter: Update eslint/sort-imports to validate options. (#18378) (connorshea) - 79bbcff linter: Update `eslint/func-style` to error on invalid configuration options. (#18390) (connorshea) - b871235 linter/plugins: Fix identifying "use strict" directives in scope analysis (#18402) (overlookmotel) - 5985141 linter: Update `jest/prefer-lowercase-title` rule to error on invalid config options. (#18332) (connorshea) - faca4b5 linter/plugins: Tokenize `let`, `static` and `yield` as `Keyword`s (#18368) (overlookmotel) - a3914fd linter/plugins: Allow line number passed to `report` to be 1 over line count (#18341) (overlookmotel) - 88e0896 linter: Update `typescript/no-restricted-types` rule to error on invalid config options. (#18329) (connorshea) - 9eec600 linter: Update `react/jsx-fragments` rule to raise an error on invalid configuration options (#18111) (connorshea) - 0fa969d linter: Update `react/no-will-update-set-state` to error on invalid config options (#18112) (connorshea) - 70e7be4 linter: Update `import/no-unassigned-import` to raise an error when passed invalid config options. (#18108) (connorshea) - 496cac7 linter: Update `unicorn/explicit-length-check` to raise an error when passed invalid config options. (#18107) (connorshea) - 080b1ec linter: Update 5 more rules to error on invalid config options. (#18113) (connorshea) - c5d05dd linter: Update 11 rules to raise an error on invalid config options. (#18109) (connorshea) - 9e359d4 linter/plugins: Set all properties on global vars objects (#18317) (overlookmotel) - 39c7f32 linter/plugins: Set `writeable` flag on variables where defined as globals (#18316) (overlookmotel) - a570693 linter/plugins: Fix `CatchClause` scopes (#18312) (overlookmotel) - 8c98e69 linter: `vitest/prefer-describe-function-title`: Check earlier to avoid false positive (#18177) (Jovi De Croock) - 44be0eb linter/plugins: Set scope analyse settings based on source type (#18306) (overlookmotel) - b9a14fd vscode: Update package.json to restrict a few more config options. (#18270) (Connor Shea) - c1260cb vscode: Update version info formatting. (#18274) (connorshea) - 2f68dc6 vscode: Update notification for client restart to specify tool. (#18273) (connorshea) ### ⚡ Performance - dc931ba linter/no-inner-declarations: Skip scope flags lookup in modules (#18249) (overlookmotel) - 07618a7 linter: Turn off `scope_build_child_ids` for SemanticBuilder (#18360) (Dunqing) - 1aac079 linter/exhaustive-deps: Simplify the logic of checking if the identifier it is a dependency of hook (#18350) (Dunqing) - 591d522 linter/block-scoped-var: Avoid `iter_all_scope_child_ids` by walking references/redeclarations scope ancestors (#18335) (Dunqing) - 2eefd6d linter/plugins: Remove branch from token parsing (#18369) (overlookmotel) ### 📚 Documentation - 698c21d linter: Modernize docs for various React rules (#18559) (connorshea) - 314a47c linter: Clarify the `no-find-dom-node` rule with a note that the method was removed in React 19. (#18556) (connorshea) - 5eff704 linter: Update `no-inner-declarations` to fix config option docs (#18511) (connorshea) - dd5d2f6 linter: Improve diagnostic message in `valid_typeof` rule. (#18507) (connorshea) - 8ccd853 npm: Update package homepage URLs and add keywords (#18509) (Boshen) - 4958233 linter: Add missing "What it does" section in prefer-reflect-apply rule. (#18475) (connorshea) - 2fa83a4 linter: Improve the docs for import/unambiguous. (#18474) (connorshea) - 7b1505c linter: Improve docs for `oxc/only-used-in-recursion` rule. (#18473) (connorshea) - ab506d6 linter/plugins: Correct comment (#18456) (overlookmotel) - 4565c73 linter: `react/display-name`: add docs for config options (#18430) (camchenry) - b95a89f linter: Fix docs for the curly rule. (#18374) (connorshea) - f675eb4 linter: Fix the `react/only-export-components` rule docs. (#18319) (connorshea) - 704db95 linter: "no-unused-vars" extend ignored files section for svelte and astro files (#18304) (Sysix) - 3af4a88 linter: Add "Examples" headers to rules missing them (#18266) (connorshea) # Oxfmt ### 💥 BREAKING CHANGES - 777fc40 ast: [**BREAKING**] Add `Ident` type (#18354) (Boshen) ### 🚀 Features - d71c15d oxfmt: Enable tailwind sort inside xxx-in-js (#18417) (leaysgur) - 52b5003 formatter,oxfmt: Support Angular `@Component({ template, styles })` (#18324) (leaysgur) ### 🐛 Bug Fixes - 224140c oxfmt: Canonicalize `..` component in config path (#18570) (leaysgur) - 30b467e formatter: Preserve trailing comments before the semicolon in class methods without a body (#18446) (Dunqing) - c205b0d ast: Remove `ThisExpression` from `TSModuleReference` (#18489) (Boshen) - 164bbd7 formatter: Preserve trailing comments inside ternary alternate branch (#18433) (Dunqing) - 1c50800 formatter: Use HTML entity escaping for JSX attribute strings (#18385) (Boshen) - 4e156d2 formatter: Preserve parentheses for `in` expressions in arrow function block bodies (#18352) (Boshen) - 7e6c15b oxfmt: Increase Tailwind CSS test timeout for Windows CI (#18339) (Boshen) - 29966eb formatter/dead-code-removal: Handle tailwind sorting (#18321) (leaysgur) - 29f41be formatter: Only expand mapped types when newline immediately follows opening brace (#18087) (Boshen) - 2194552 formatter: Relocate leading comments for single-element union/intersection types (#18083) (Boshen) ### ⚡ Performance - 85ab400 formatter: Store `AstNodes` itself instead of `&'a AstNodes` as the `parent` field of `AstNode` (#18428) (Dunqing) - 194d384 formatter: Reduce AstNode size by 8 bytes using following_span_start (#18347) (Dunqing) - b2df8fb oxfmt: Enable tailwind plugin only for relevant parser (#18418) (leaysgur) ### 📚 Documentation - 8ccd853 npm: Update package homepage URLs and add keywords (#18509) (Boshen) Co-authored-by: Boshen <[email protected]>

github-actions bot added A-linter Area - Linter C-performance Category - Solution not expected to change functional behavior, only performance labels Jan 21, 2026

Dunqing mentioned this pull request Jan 21, 2026

refactor(minifier): turn off scope_tree_child_ids for SemanticBuilder #18241

Merged

Dunqing mentioned this pull request Jan 21, 2026

perf(linter/block-scoped-var): avoid iter_all_scope_child_ids by walking references/redeclarations scope ancestors #18335

Merged

Dunqing force-pushed the 01-21-perf_linter_exhaustive-deps_simplify_the_logic_of_checking_if_the_identifier_it_is_a_dependency_of_hook branch from 1e616dc to 9746e94 Compare January 21, 2026 14:02

This was referenced Jan 21, 2026

perf(linter): turn off scope_build_child_ids for SemanticBuilder #18360

Merged

feat(oxc)!: remove CompilerInterface::semantic_child_scope_ids #18361

Merged

feat(semantic)!: remove Scoping::scope_build_child_ids and all related APIs #18362

Merged

Dunqing force-pushed the 01-21-refactor_linter_block-scoped-var_avoid_iter_all_scope_child_ids_by_walking_references_redeclarations_scope_ancestors branch from 0b5bb74 to 0d903c4 Compare January 21, 2026 16:30

Dunqing force-pushed the 01-21-perf_linter_exhaustive-deps_simplify_the_logic_of_checking_if_the_identifier_it_is_a_dependency_of_hook branch from 9746e94 to 0c42127 Compare January 21, 2026 16:30

Dunqing changed the base branch from 01-21-refactor_linter_block-scoped-var_avoid_iter_all_scope_child_ids_by_walking_references_redeclarations_scope_ancestors to graphite-base/18350 January 22, 2026 02:13

Dunqing marked this pull request as ready for review January 22, 2026 03:40

Dunqing requested a review from camc314 as a code owner January 22, 2026 03:40

Dunqing assigned overlookmotel Jan 22, 2026

Dunqing requested a review from overlookmotel January 22, 2026 03:40

Dunqing force-pushed the graphite-base/18350 branch from 0d903c4 to b5802c6 Compare January 22, 2026 03:42

Dunqing force-pushed the 01-21-perf_linter_exhaustive-deps_simplify_the_logic_of_checking_if_the_identifier_it_is_a_dependency_of_hook branch from 0c42127 to c5cb6d3 Compare January 22, 2026 03:42

Dunqing changed the base branch from graphite-base/18350 to 01-21-refactor_linter_block-scoped-var_avoid_iter_all_scope_child_ids_by_walking_references_redeclarations_scope_ancestors January 22, 2026 03:42

graphite-app bot added the 0-merge Merge with Graphite Merge Queue label Jan 22, 2026

graphite-app bot force-pushed the 01-21-refactor_linter_block-scoped-var_avoid_iter_all_scope_child_ids_by_walking_references_redeclarations_scope_ancestors branch from b5802c6 to 591d522 Compare January 22, 2026 06:33

graphite-app bot force-pushed the 01-21-perf_linter_exhaustive-deps_simplify_the_logic_of_checking_if_the_identifier_it_is_a_dependency_of_hook branch from c5cb6d3 to 1aac079 Compare January 22, 2026 06:33

graphite-app bot pushed a commit that referenced this pull request Jan 22, 2026

perf(linter): turn off scope_build_child_ids for SemanticBuilder (#…

07618a7

…18360) No use case in the linter after #18350 and #18335, so turn it off.

Base automatically changed from 01-21-refactor_linter_block-scoped-var_avoid_iter_all_scope_child_ids_by_walking_references_redeclarations_scope_ancestors to main January 22, 2026 06:38

graphite-app bot merged commit 1aac079 into main Jan 22, 2026
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graphite-app bot deleted the 01-21-perf_linter_exhaustive-deps_simplify_the_logic_of_checking_if_the_identifier_it_is_a_dependency_of_hook branch January 22, 2026 06:39

graphite-app bot removed the 0-merge Merge with Graphite Merge Queue label Jan 22, 2026

Boshen mentioned this pull request Jan 26, 2026

release(apps): oxlint v1.42.0 && oxfmt v0.27.0 #18573

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perf(linter/exhaustive-deps): simplify the logic of checking if the identifier it is a dependency of hook#18350

perf(linter/exhaustive-deps): simplify the logic of checking if the identifier it is a dependency of hook#18350
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