release(crates): v0.55.0

[oxc-bot]

[0.55.0] - 2025-03-05

• 4056560 ast/estree: [BREAKING] Option to return JS-only AST (feat(ast/estree)!: option to return JS-only AST #9520) (overlookmotel)

Features

• 59a9f1d ast: Add AstBuilder::*_with_pure etc methods (feat(ast): add AstBuilder::*_with_pure etc methods #9417) (Dunqing)
• af02a87 ast/estree: Property have consistent field order (feat(ast/estree): Property have consistent field order #9547) (overlookmotel)
• 3e4f909 ast/estree: ESTree AST ExportNamedDeclaration always have attributes field (feat(ast/estree): ESTree AST ExportNamedDeclaration always have attributes field #9546) (overlookmotel)
• d55dbe2 ast/estree: Raw transfer (experimental) (feat(ast/estree): raw transfer (experimental) #9516) (overlookmotel)
• 29041fb data_structures: Move InlineString into oxc_data_structures crate (feat(data_structures): move InlineString into oxc_data_structures crate #9549) (overlookmotel)
• 9321439 minifier: Merge throw statements at the end (feat(minifier): merge throw statements at the end #9539) (sapphi-red)
• 803f061 minifier: Apply __NO_SIDE_EFFECTS__ (feat(minifier): apply __NO_SIDE_EFFECTS__ #9533) (Boshen)
• 2326cef parser: Apply pure to argument of unary expression (feat(parser): apply pure to argument of unary expression #9530) (Dunqing)
• 45ace44 transformer: Add /* @_PURE__ */ annotation for pure calls (feat(transformer): add /* @_PURE__ */ annotation for pure calls #9424) (Dunqing)
• ffd485c transformer, napi/transform: Expose moduleRunnerTransform function (feat(transformer, napi/transform): expose moduleRunnerTransform function #9532) (Dunqing)

Bug Fixes

• a0f6f37 ast/estree: Raw transfer support showSemanticErrors option (fix(ast/estree): raw transfer support showSemanticErrors option #9522) (overlookmotel)
• a88eb56 parser: Parsing errors occur when type parameters are followed by as or satisfies (fix(parser): parsing errors occur when type parameters are followed by as or satisfies #9553) (Dunqing)
• 2c6e3f1 parser: Fix false positive parsing optional member expr (fix(parser): fix false positive parsing optional member expr #9534) (camc314)
• cead38d transformer/optional-chaining: Fix context of optional chain call (fix(transformer/optional-chaining): fix context of optional chain call #9526) (hi-ogawa)

Performance

• 6b4a8c6 ast, codegen, transformer: Avoid allocations when converting RegExpFlags to string (perf(ast, codegen, transformer): avoid allocations when converting RegExpFlags to string #9550) (overlookmotel)
• bc14ee5 mangler: Use shorter InlineString (perf(mangler): use shorter InlineString #9552) (overlookmotel)

Documentation

• a453f0b npm/oxc-parser: Update README (Boshen)

Refactor

• 734b6b6 ast: RegExpFlags::to_string return flags in alphabetical order (refactor(ast): RegExpFlags::to_string return flags in alphabetical order #9548) (overlookmotel)
• c1a8cea ast/estree: Simplify serializing RegExpLiterals (refactor(ast/estree): simplify serializing RegExpLiterals #9551) (overlookmotel)
• fb4d0b6 transformer: Shorten code for using *_with_scope_id methods (refactor(transformer): shorten code for using *_with_scope_id methods #9538) (Dunqing)
• 0c46f2a transformer/object-rest-spread: Use helper_call instead of helper_load + call_expression (refactor(transformer/object-rest-spread): use helper_call instead of helper_load + call_expression #9536) (Dunqing)

Testing

• 4378a66 ast/estree: Speed up raw transfer tests (test(ast/estree): speed up raw transfer tests #9521) (overlookmotel)
• dc1465e minifier: Enable some tests in minimize_conditions (test(minifier): enable some tests in minimize_conditions #9543) (sapphi-red)
• 0a5c73b minifier: Enable some tests in peephole directory (test(minifier): enable some tests in peephole directory #9542) (sapphi-red)
• 55e7ee9 minifier: Enable some esbuild tests (test(minifier): enable some esbuild tests #9540) (sapphi-red)

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[github-actions]

Monitor Oxc

suite	result
(dce)	❌
(compressor)	❌
Isolated Declarations	✅
(mangler)	✅
(transformer)	❌
(codegen)	✅
(whitespace)	❌

[codspeed-hq]

CodSpeed Performance Report

Merging #9554 will not alter performance

_{Comparing release/crates-1741155514 (52ae9b8) with main (a88eb56)}

Summary

✅ 39 untouched benchmarks