perf(parser): optimize parse_simple_arrow_function_expression

[ulrichstark]

The function now accepts IdentifierReference instead of Expression to make its implementation simpler and avoid one match. Also all code around self.ctx is removed because it wasn't needed. This results in less code and a speedup in parser benchmarks of around 1% on my device.

[Copilot]

Pull Request Overview

This PR optimizes the parse_simple_arrow_function_expression function by changing its parameter type from Expression to IdentifierReference and removing unnecessary context management code. The changes simplify the implementation and improve parser performance by approximately 1%.

• Refactored function signature to accept IdentifierReference directly instead of Expression
• Removed redundant context management around self.ctx
• Simplified parameter construction logic by eliminating pattern matching

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
crates/oxc_parser/src/js/expression.rs	Updated call site to pass identifier reference directly and reordered condition check
crates/oxc_parser/src/js/arrow.rs	Refactored function signature, removed context management, and simplified parameter construction

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[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #13965 will not alter performance

_{Comparing ulrichstark:speedup-parse_simple_arrow_function_expression (636f02c) with main (0185984)}

Summary

✅ 37 untouched

[camc314]

nice, codspeed shows 1% as well!

[Boshen]

Nice!