perf(parser): add Modifiers::contains_accessibility

[overlookmotel]

Add Modifiers::contains_accessibility method.

modifiers.contains_accessibility() is cheaper than modifiers.accessibility().is_some(). This shaves a few instructions off parse_formal_parameter_with_decorators.

[overlookmotel]

• perf(parser): move kinds field of Modifiers to first #20833
• perf(parser): add Modifiers::contains_accessibility #20832 👈 (View in Graphite)
• perf(parser): make Modifiers::accessibility branchless #20827
• perf(parser): add #[inline] to trivial modifier methods #20826
• perf(parser): defer calculation of Modifier spans #20823 : 1 other dependent PR (#20824 )
• perf(parser): remove branch from parse_modifiers #20821
• perf(parser): reduce Kind to ModifierKind conversions in eat_modifiers_before_declaration #20820
• refactor(parser): shorten code handling illegal modifiers #20781
• perf(parser): fast path for no syntax errors when checking modifiers #20748
• perf(parser): remove a lookahead from eat_modifiers_before_declaration #20755
• refactor(parser): nest modifiers types in modules #20754
• refactor(parser): re-order modifiers code #20753
• perf(parser): store Modifiers on stack #20742
• perf(parser): add Modifiers::get method #20741
• refactor(parser): rename ModifierKinds::empty to none #20740
• refactor(parser): rename ModifierFlags to ModifierKinds #20739
• refactor(parser): simplify ModifierFlags #20738
• refactor(parser): import from std at top level #20737
• refactor(parser): remove Modifier::is_static() #20736
• refactor(parser): remove dead code from modifier parsing #20735
• main

---

How to use the Graphite Merge Queue

Add either label to this PR to merge it via the merge queue:

• 0-merge - adds this PR to the back of the merge queue
• hotfix - for urgent changes, fast-track this PR to the front of the merge queue

You must have a Graphite account in order to use the merge queue. Sign up using this link.

An organization admin has enabled the Graphite Merge Queue in this repository.

Please do not merge from GitHub as this will restart CI on PRs being processed by the merge queue.

This stack of pull requests is managed by Graphite. Learn more about stacking.

[Copilot]

Pull request overview

Adds a lightweight Modifiers::contains_accessibility helper to avoid the heavier accessibility().is_some() path in a hot parsing branch.

Changes:

• Add Modifiers::contains_accessibility() based on a bitset intersection check.
• Use contains_accessibility() in parse_formal_parameter_with_decorators to reduce work in the parameter-property validation path.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
crates/oxc_parser/src/modifiers.rs	Introduces Modifiers::contains_accessibility() helper.
crates/oxc_parser/src/js/function.rs	Switches the parameter-property guard to use contains_accessibility() for a cheaper check.

[codspeed-hq]

Merging this PR will not alter performance

✅ 48 untouched benchmarks
⏩ 8 skipped benchmarks¹

---

_{Comparing om/03-29-perf_parser_add_modifiers_contains_accessibility_ (2a06835) with om/03-28-perf_parser_make_modifiers_accessibility_branchless (5995339)}

Footnotes

1. 8 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]

Merge activity

• Mar 29, 3:33 PM UTC: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Mar 29, 3:40 PM UTC: The Graphite merge queue removed this pull request due to removal of a downstack PR #20820.
• Mar 29, 3:40 PM UTC: camc314 added this pull request to the Graphite merge queue.
• Mar 29, 3:41 PM UTC: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Mar 29, 3:41 PM UTC: The merge label '0-merge' was removed. This PR will no longer be merged by the Graphite merge queue
• Mar 29, 3:42 PM UTC: camc314 added this pull request to the Graphite merge queue.
• Mar 29, 4:19 PM UTC: The Graphite merge queue removed this pull request due to downstack failures on PR #20820.
• Mar 29, 4:47 PM UTC: The merge label '0-merge' was removed. This PR will no longer be merged by the Graphite merge queue
• Mar 29, 4:48 PM UTC: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Mar 29, 4:52 PM UTC: graphite-app added this pull request to the Graphite merge queue.
• Mar 29, 4:53 PM UTC: Merged by the Graphite merge queue.