release(crates): v0.81.0

[oxc-bot]

[0.81.0] - 2025-08-06

💥 BREAKING CHANGES

• 2cc1001 ast: [BREAKING] Remove ExportDefaultDeclaration exported field (refactor(ast)!: remove ExportDefaultDeclaration exported field #12808) (overlookmotel)
• 50b91ac ast: [BREAKING] Remove IdentifierReference from qualifier field of TSImportType (feat(ast)!: remove IdentifierReference from qualifier field of TSImportType #12799) (camc314)

🐛 Bug Fixes

• 00fda91 minifier: Fix KATAKANA MIDDLE DOT syntax error for unicode 4.1 to 15 (fix(minifier): fix KATAKANA MIDDLE DOT syntax error for unicode 4.1 to 15 #12829) (Boshen)
• 3eed87a codegen: Wrap parens for TSUnionType (fix(codegen): wrap parens for TSUnionType #12830) (Boshen)
• 47e2c59 estree: Fix serialization of TSImportTypeQualifier (fix(estree): fix serialization of TSImportTypeQualifier #12801) (camc314)

🚜 Refactor

• d93e373 estree: Remove serializer for f32 (refactor(estree): remove serializer for f32 #12838) (Boshen)
• febb4fa parser: Add StatementContext::TopLevelStatementList (refactor(parser): add StatementContext::TopLevelStatementList #12806) (overlookmotel)
• f3f6012 ecmascript: Avoid redundant checks by splitting up match arms (refactor(ecmascript): avoid redundant checks by splitting up match arms #12782) (Ulrich Stark)
• 69fd08d semantic: Improve unused label tracking and add debug assertions (refactor(semantic): improve unused label tracking and add debug assertions #12812) (camc314)

⚡ Performance

• 2c4369a syntax,codegen: Replace ryu_js with dragonbox_ecma for floating point formatting (perf(syntax,codegen): Replace ryu_js with dragonbox_ecma for floating point formatting #12821) (Copilot)
• 373b5b7 lexer: Add #[cold] to unicode path (perf(lexer): add #[cold] to unicode path #12768) (copilot-swe-agent)
• ae0137c lexer: Improve byte_handlers for ! and ? (perf(lexer): improve byte_handlers for ! and ? #12831) (Boshen)
• e8ac1a5 codegen: Write indent in chunks of 32 bytes (perf(codegen): write indent in chunks of 32 bytes #12745) (overlookmotel)
• 5d96425 parser: Register import / export statements in module record directly (perf(parser): register import / export statements in module record directly #12807) (overlookmotel)
• 00bdfc0 parser: Remove a bound check in match_keyword (perf(parser): remove a bound check in match_keyword #12778) (Boshen)
• 09ae2a9 linter: Eliminate unnecessary Iterator::collect() allocations (perf(linter): Eliminate unnecessary Iterator::collect() allocations #12776) (Copilot)

🧪 Testing

• d79f4ec parser: Track number of allocations (test(parser): track number of allocations #12555) (camchenry)

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[github-actions]

Triggering Monitor Oxc https://github.com/oxc-project/monitor-oxc/actions/workflows/ci.yml

[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #12840 will not alter performance

_{Comparing release/crates-1754461618 (69ca68f) with main (44b37f7)¹}

Summary

✅ 34 untouched benchmarks

Footnotes

1. No successful run was found on main (c01db1c) during the generation of this report, so 44b37f7 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩