perf(parser): add #[inline] to trivial modifier methods

[overlookmotel]

Add #[inline] to methods of Modifier, Modifiers, and ModifierKinds which are only a few instructions. Compiler very likely inlines them anyway, but it's good to make sure.

Also make Modifier::new a const function, because there's no reason not to.

[overlookmotel]

• perf(parser): move kinds field of Modifiers to first #20833
• perf(parser): add Modifiers::contains_accessibility #20832
• perf(parser): make Modifiers::accessibility branchless #20827
• perf(parser): add #[inline] to trivial modifier methods #20826 👈 (View in Graphite)
• 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

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[Copilot]

Pull request overview

This PR adds #[inline] annotations to several small, frequently-called helper methods in oxc_parser’s modifier handling to encourage consistent inlining in hot parsing paths.

Changes:

• Added #[inline] to trivial Modifier constructors/accessors (new, span).
• Added #[inline] to small Modifiers helpers (empty, new_single, add, contains, kinds).
• Added #[inline] to ModifierKind::len.

[codspeed-hq]

Merging this PR will not alter performance

✅ 48 untouched benchmarks
⏩ 8 skipped benchmarks¹

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_{Comparing om/03-28-perf_parser_add_inline_to_trivial_modifier_methods (2208114) with main (eb02c88)²}

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. ↩

2. No successful run was found on main (055a7ac) during the generation of this report, so eb02c88 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[camc314]

Merge activity

• Mar 29, 3:32 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 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, 4:43 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, 4:46 PM UTC: camc314 added this pull request to the Graphite merge queue.
• Mar 29, 4:48 PM UTC: Merged by the Graphite merge queue.