perf(linter/typescript/no-restricted-types): O(1) banned-type lookups#23827
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Precompute a normalized-name HashMap and keyword flags at config load so the hot path (~80k type nodes on large TS codebases) avoids linear scans and repeated whitespace normalization. Prefer AST type names over source slices for simple references; only match full generic spans when needed.
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…#23827) ## Summary - Speed up `typescript/no-restricted-types` on large TypeScript trees by replacing per-node linear scans with a precomputed lookup index. - On **x-web** (`oxlint --debug timings`), this rule was a clear hotspot (**~137 ms / ~9% of rule time, ~80k calls**, number 2 after `react/react-compiler`). After this change it drops to **~2.6 ms / ~0.2%** with the **same call count** — about **53× less rule CPU** for this rule and **~1s** off full-lint wall time on that repo. ### What was slow Each type-related node (keywords, `TSTypeReference`, implements/extends, empty `[]`/`{}`, …) did roughly: 1. **O(n) scan** of the configured `types` map 2. **`removeSpaces` on every config key** on each lookup 3. Often a **source slice + normalize** even for simple names like `Foo` or `string` That adds up across tens of thousands of type nodes on apps like x-web. ### What we changed - Build a **normalized-name → ban config** `FxHashMap` once at config load (whitespace-stripped keys, TS-ESLint-compatible). - **Keyword / `[]` / `{}` flags** so unbanned keywords take an empty match arm (no HashMap work). - Prefer **AST type names** (`Foo`, `NS.Foo`) for references when possible instead of always using source text. - Check full generic spans (e.g. `Banned<any>`) **only if** the config has generic/complex keys (`<` / `{` / `[` beyond plain `[]`/`{}`). Behavior is intended to be unchanged; existing unit/fix tests pass. ## Benchmark (x-web) Release `oxlint`, same machine, `~/workspace/x-web` with project `.oxlintrc.json`: **5760 files**, **261 rules**, **18 threads**. | | **main** | **this PR** | **Δ** | |--|----------|-------------|--------| | **Finished** | **10.1s** | **9.1s** | **~−1.0s (~10%)** | | **`time` real** | 10.56s | 9.57s | ~−1.0s | | **`time` user** | 33.41s | 30.81s | ~−2.6s CPU | | **Diagnostics** | 0 warnings / 0 errors | 0 / 0 | same | ### `typescript/no-restricted-types` | | **main** | **this PR** | **Δ** | |--|----------|-------------|--------| | **Time** | **137.1 ms** | **2.6 ms** | **~53× faster** (~−134 ms) | | **Share of rule time** | **9.2%** (#2 overall) | **0.2%** | off the hot list | | **Calls** | 80,462 | 80,462 | unchanged | Command used: ```bash oxlint --debug timings . ``` (Compared release builds of `main` vs this branch.) ## Test plan - [x] `cargo test -p oxc_linter no_restricted_types` - [x] `cargo clippy -p oxc_linter --lib --tests --no-deps -- -D warnings` - [x] Profiled on x-web — see table above --------- Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com> Co-authored-by: Cameron <[email protected]>
Boshen
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# Oxlint ### 🚀 Features - 7db7a29 allocator: Add `ReplaceWith` trait (#24012) (overlookmotel) - a2c97f3 linter/unicorn: Implement `explicit-timer-delay` rule (#23612) (Mikhail Baev) - 85735cb linter/unicorn: Implement `no-confusing-array-with` rule (#23638) (Shekhu☺️ ) - cb4fbb9 linter/eslint: Implement no-unreachable-loop rule (#23975) (Todor Andonov) - dc32112 linter/eslint/no-constant-binary-expression: Check relational comparisons (#24088) (camc314) - 439c344 linter/jsdoc: Added missing options to `jsdoc/require-param` rule (#23364) (kapobajza) - 62af717 linter/unicorn/filename-case: Add `lowercase` and `screamingSnakeCase` (#24045) (Boshen) - d963967 linter/unicorn/no-array-sort: Add `allowAfterSpread` option (#24043) (Boshen) - 0a75682 linter: Add per-rule timings for type-aware linting (#22488) (camchenry) - 743e222 linter/react: Add `disallowedValues` option for `forbid-dom-props` rule (#23970) (Mikhail Baev) ### 🐛 Bug Fixes - 7b80010 linter: Use direct binding symbol ids (#24216) (camc314) - 8f94b49 linter/import/no-duplicates: Don't flag a type-only import beside a side-effect import (#24030) (Boshen) - d8c3fee linter/react/rules-of-hooks: Flag `useEffectEvent` escapes (#23764) (Rayan Salhab) - 0a7312b linter/no-deprecated-functions: Map `require.requireActual` to `jest.requireActual` (#23627) (Jerry Zhao) - d9e3ab3 linter/eslint/no-useless-return: Handle switch case continuation (#23984) (camc314) - 0b25582 ast: Type binding node `typeAnnotation` as `TSTypeAnnotation | null` (#23113) (Boshen) - 122d112 linter/eslint/no-restricted-imports: Flag dynamic import() expressions (#24029) (Boshen) - 59b6b83 linter: Avoid `OnceLock` re-entry on cyclic `export *` re-exports (#23632) (Jerry Zhao) - dd09af0 linter/import/namespace: Avoid panic on destructuring of an unresolvable namespace re-export (#23626) (Jerry Zhao) - bdb51c7 linter/jest/prefer-ending-with-an-expect: Validate config patterns (#24122) (camc314) - e383843 linter/unicorn/prefer-modern-dom-apis: Skip fixer for non identifier arguments (#23630) (Jerry Zhao) - 0ac4c83 linter: Detect circular config extends (#24115) (camc314) - bae1edf linter/import/namespace: Check namespace imports after named imports (#24094) (camc314) - cd8fdfe linter/eslint/no-eval: Recognize Array.from family thisArg (#24091) (camc314) - 851ee43 linter/eslint/no-eval: Resolve this binding for functions returned from an IIFE (#23643) (Jerry Zhao) - 002ab35 linter/unicorn: Avoid prefer-array-find rest destructuring false positive (#23654) (ColemanDunn) - 01c8775 linter/unicorn/filename-case: Keep digits attached in screamingSnakeCase (#24056) (Boshen) - f256941 linter: Recognize `@effect/vitest` as a vitest import source (#24025) (Boshen) - 73eeb1d linter/import/extensions: Honor per-extension `never` for explicit extensions (#24031) (Boshen) - d4ebe1f linter: Reject non-object oxlint config files (#24026) (Boshen) - 45d607d linter/react/forbid-component-props: Make allow/disallow lists optional in schema (#24024) (Boshen) - 54076ad linter/unicorn/no-array-for-each: Suggest entries loop for index callbacks (#24004) (camc314) - d057736 linter/jsdoc: Avoid param root underflow (#23945) (camc314) - 29c76bf linter/unicorn/prefer-at: Skip object numeric-key access (#23909) (Gaurav Dubey) ### ⚡ Performance - 657a8fc linter/oxc/bad-array-method-on-arguments: Only run on member expressions instead of all identifiers (#24164) (camchenry) - 073d9e7 linter/eslint/prefer-rest-params: Run on functions instead of all identifiers (#24163) (camchenry) - e5a4162 linter/jest/no-confusing-set-timeout: Early exit fast path (#24092) (camc314) - bca7ce5 linter: Only run react-perf rules on JSX attribute nodes (#24083) (camchenry) - 6881bf6 linter: Compute `apply_overrides` rule set lazily (#23648) (Jerry Zhao) - 911c106 linter/eslint/no-obj-calls: Use resolved reference instead of scope walk (#23895) (Marius Schulz) - dc8fd9a linter/unicorn/prefer-dom-node-text-content: Change dispatch to run only on less common node types (#23897) (Connor Shea) - fdbd34d linter/eslint/no-useless-call: Fast-path static callees (#24077) (camc314) - b1be114 linter/import/extensions: Skip empty config and borrow extensions (#24075) (camc314) - 4781b2d linter/eslint/no-obj-calls: Use direct global matches (#24076) (camc314) - e6cee89 linter: Avoid node-chain allocation for non-Jest calls (#23907) (Yagiz Nizipli) - 30dc517 linter/typescript/no-restricted-types: O(1) banned-type lookups (#23827) (Yagiz Nizipli) ### 📚 Documentation - 6ca9125 linter/typescript: Clarify consistent-type-imports behavior (#23972) (camc314) # Oxfmt ### 🚀 Features - 4f4313e formatter_css: Update oxc-css-parser 0.0.5 (#24120) (leaysgur) - 0ccd8a1 formatter_graphql: Update oxc-graphql-parser 0.0.5 (#24106) (leaysgur) - 89ec3d9 formatter_core: Add literal line and root indention primitives (#24051) (leaysgur) - 213a96b formatter_core: Add no-expand-parent for multiline text (#24050) (leaysgur) - 0e5bcc9 formatter_graphql: Update oxc-graphql-parser 0.0.4 (#24039) (leaysgur) - e0b35a1 formatter_css: Update `[email protected]` (#23974) (leaysgur) ### 🐛 Bug Fixes - 1fe6546 formatter: Omit unneeded `;` for type members with `no-semi` (#24212) (leaysgur) - 0ad7316 formatter: Print space for `ForStatement`.`update` only if exists (#24211) (leaysgur) - 3abbed5 formatter: Print `;` before jsdoc type-cast parens with no-semi (#24208) (leaysgur) - 9af3833 formatter_css: Make scss formatter consistent (#24207) (leaysgur) - 46d7194 formatter_css: Use fill IR for `@forward` members (#24206) (leaysgur) - e31038f formatter_css: Keep comment inside sass config list (#24205) (leaysgur) - d3b9591 formatter: Add parens around `await/yield` with `<T>` (#24202) (leaysgur) - 2121a55 oxfmt: Reuse tinypool process during the same LSP process (#24197) (leaysgur) - 9bf4b4a formatter_css: Align CSS output to Prettier 3.9.1 (#24100) (leaysgur) - cd2452e formatter_css: Align SCSS output to Prettier 3.9.1 (#24097) (leaysgur) - 4ee8745 formatter_css: Keep selector value contain line-break without breaking line (#24055) (leaysgur) - e1ece97 formatter_graphql: Break `implements` list by print-width (#23997) (leaysgur) - 0a6b16c formatter_json: Preserve key and literal value for json-stringify (#23996) (leaysgur) - 903ab6e formatter_css: Preserve newlines in css-in-js selector list (#23992) (leaysgur) - ea5d095 oxfmt: Update `--migrate prettier` (#23963) (leaysgur) ### ⚡ Performance - 468e1e3 formatter_core: Make printer queues cursor-based (#24098) (Boshen) - c59f2fe rust: Return impl ExactSizeIterator from slice-backed accessors (#24144) (Boshen) - c292fb2 formatter: Inline fits element dispatcher (#23982) (camc314) Co-authored-by: Boshen <[email protected]>
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Summary
typescript/no-restricted-typeson large TypeScript trees by replacing per-node linear scans with a precomputed lookup index.oxlint --debug timings), this rule was a clear hotspot (~137 ms / ~9% of rule time, ~80k calls, number 2 afterreact/react-compiler). After this change it drops to ~2.6 ms / ~0.2% with the same call count — about 53× less rule CPU for this rule and ~1s off full-lint wall time on that repo.What was slow
Each type-related node (keywords,
TSTypeReference, implements/extends, empty[]/{}, …) did roughly:typesmapremoveSpaceson every config key on each lookupFooorstringThat adds up across tens of thousands of type nodes on apps like x-web.
What we changed
FxHashMaponce at config load (whitespace-stripped keys, TS-ESLint-compatible).[]/{}flags so unbanned keywords take an empty match arm (no HashMap work).Foo,NS.Foo) for references when possible instead of always using source text.Banned<any>) only if the config has generic/complex keys (</{/[beyond plain[]/{}).Behavior is intended to be unchanged; existing unit/fix tests pass.
Benchmark (x-web)
Release
oxlint, same machine,~/workspace/x-webwith project.oxlintrc.json: 5760 files, 261 rules, 18 threads.timerealtimeusertypescript/no-restricted-typesCommand used:
oxlint --debug timings .(Compared release builds of
mainvs this branch.)Test plan
cargo test -p oxc_linter no_restricted_typescargo clippy -p oxc_linter --lib --tests --no-deps -- -D warnings