perf(linter/no-extra-non-null-assertion): reduce node matches#22588
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Pull request overview
This PR optimizes the typescript/no-extra-non-null-assertion lint rule by narrowing its AST visitation to TSNonNullExpression nodes and moving optional member/call handling to checks against the node’s parent context. This fits the linter’s broader design of minimizing per-node rule dispatch overhead via targeted NODE_TYPES.
Changes:
- Restrict rule execution to
TSNonNullExpressionnodes and early-return for all others. - Rework redundant-assertion detection to use parent/chain context (including optional member/call and paren-skipping parent lookup).
- Regenerate the rule runner so the rule is registered only for
AstType::TSNonNullExpression.
Reviewed changes
Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| crates/oxc_linter/src/rules/typescript/no_extra_non_null_assertion.rs | Reworks rule logic to run only on TSNonNullExpression and determine redundancy via parent/chain context. |
| crates/oxc_linter/src/generated/rule_runner_impls.rs | Updates generated NODE_TYPES registration to only include TSNonNullExpression for this rule. |
Merging this PR will not alter performance
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**Summary** - Restrict `typescript/no-extra-non-null-assertion` to run only on `TSNonNullExpression` nodes. - Move optional member/call handling to parent/chain context checks from the non-null assertion node. - Regenerate the linter rule runner so this rule is registered only for `AstType::TSNonNullExpression`. **Performance** Profiled release `oxlint` with only this rule enabled: ```bash oxlint -f default --disable-nested-config \ --disable-unicorn-plugin --disable-oxc-plugin \ -A all -W no-extra-non-null-assertion \ --debug=timings --threads=1 . ``` Full repo profile over 5 runs. The repo contains intentionally invalid fixture files, so both before and after reported `Found 0 warnings and 534 errors`, but timing output was still emitted and file counts matched. | Build | Files | Rule calls | Avg rule time | | --- | ---: | ---: | ---: | | main | 3914 | 31,289 | 0.670 ms | | this PR | 3914 | 332 | 0.019 ms | This is about a 99% reduction in rule calls for this rule on the repo profile.
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# Oxlint ### 🚀 Features - 10da26b linter: `no-misleading-character-class` add suggestions for regex literal (#22681) (Sysix) - b84941e linter/vue: Implement no-expose-after-await rule (#22675) (bab) - 98b98c1 linter/vue: Implement no-computed-properties-in-data rule (#22674) (bab) - 868e2e8 linter: Add suggestion for `no-misleading-character-class` (#22631) (Sysix) - 2d4c919 oxlint: Support `vite-plus/resolveConfig` for vite.config.ts (#22456) (leaysgur) - 2a60012 linter/vue: Implement require-render-return rule (#22613) (bab) - 9f227fd linter/vue: Implement no-deprecated-props-default-this rule (#21892) (bab) - 9cd28b3 linter: Add debug option to print files to be linted (#22546) (camchenry) - 87f065e linter/vue: Implement return-in-emits-validator rule (#21935) (bab) - ea0380c linter/unicorn: Implement `import-style` rule (#22173) (Hao Chen) - dde40fe linter/vue: Implement no-watch-after-await rule (#22006) (bab) - a735eb0 linter/vue: Implement valid-next-tick rule (#22531) (bab) - 6dc615d linter/vue: Implement no-shared-component-data rule (#21842) (bab) - a656418 linter/vue: Implement valid-define-options rule (#22107) (bab) - bb6f1b2 linter/vue: Implement require-slots-as-functions rule (#22244) (bab) - 5fa4774 linter/n: Implement `callback-return` rule (#22470) (Mikhail Baev) ### 🐛 Bug Fixes - 52bd016 linter: Respect allow unused disable directives in LSP (#22715) (camc314) - fa7c463 semantic: Correct TS enum member symbol spans (#22689) (camc314) - ed445ba linter: Respect flags overrides for `RegExp(/regex/i, "u")` (#22678) (Sysix) - 26b9396 semantic: Resolve parameter decorators outside parameter scope (#22623) (camc314) - 203952d linter: `no-misleading-character-class` fix `is_unicode_code_point_escape` check (#22655) (Sysix) - 2f64d3d linter: `no-misleading-character-class` own diagnostic for surrogate pairs without u flag (#22654) (Sysix) - 0c6ebc2 linter/eslint/no-lone-blocks: Do not flag empty loops (#22649) (Mikhail Baev) - 2a7562e linter/no-focused-tests: Mark fixer as a suggestion (#22645) (camc314) - dbe644f linter: Respect args none for unused rest parameters (#22627) (camc314) - d0211b0 linter: Allow undefined in DummyRuleMap index (#22626) (camc314) - 36fc0ec oxlint/lsp: "ignore this" actions merge with existing directive (#22604) (Sysix) - f7f370e linter/vitest/prefer-expect-type-of: Recommend `toBeTypeOf` instead of `expectTypeOf` (#22612) (Mikhail Baev) - 77063e5 linter/consistent-indexed-object-style: Preserve interface modifiers in fixes (#22579) (camc314) - 4f33aa7 linter: Treat `TSGlobalDeclaration` as ambient in `has_ambient_typescript_ancestor` (#22577) (camc314) ### ⚡ Performance - c22938d linter/no-async-endpoint-handlers: Populate node types (#22601) (camc314) - 607486e linter/no-negated-condition: Populate node types (#22602) (camc314) - 4dcaa59 linter/consistent-type-imports: Populate node types (#22600) (camc314) - 5bd3b25 linter/no-unused-vars: Avoid cloned ancestor iterator (#22598) (camc314) - 97fe9ba linter/no-extra-non-null-assertion: Reduce node matches (#22588) (camc314) - ae98296 linter/consistent-indexed-object-style: Populate node types (#22578) (camc314) # Oxfmt ### 🚀 Features - 16b8058 oxfmt: Support `vite-plus/resolveConfig` for vite.config.ts (#22454) (leaysgur) ### 🐛 Bug Fixes - 5a26479 formatter: Preserve import phases (#22692) (Cameron) ### ⚡ Performance - 78cf83f formatter: Pre-size output buffer using source text length (#22594) (Dunqing) Co-authored-by: Dunqing <[email protected]>
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Summary
typescript/no-extra-non-null-assertionto run only onTSNonNullExpressionnodes.AstType::TSNonNullExpression.Performance
Profiled release
oxlintwith only this rule enabled:oxlint -f default --disable-nested-config \ --disable-unicorn-plugin --disable-oxc-plugin \ -A all -W no-extra-non-null-assertion \ --debug=timings --threads=1 .Full repo profile over 5 runs. The repo contains intentionally invalid fixture files, so both before and after reported
Found 0 warnings and 534 errors, but timing output was still emitted and file counts matched.This is about a 99% reduction in rule calls for this rule on the repo profile.