💥 BREAKING CHANGES

• 54cc121 ast: [BREAKING] Split MetaProperty into ImportMeta and NewTarget (feat(ast)!: split MetaProperty into ImportMeta and NewTarget #24557) (camc314)

🚀 Features

• 4c71560 parser: More friendly error for spread element in dynamic imports (feat(parser): more friendly error for spread element in dynamic imports #24705) (sapphi-red)
• 7b045cd minfier: Drop last break from last switch case (feat(minfier): drop last break from last switch case #24673) (Armano)
• 7d3c178 minifier: Remove unreachable recursive functions (feat(minifier): remove unreachable recursive functions #24125) (Dunqing)
• 94f99b3 ast: Allow NONE to be passed to AST builder methods where Option<ArenaVec> is expected (feat(ast): allow NONE to be passed to AST builder methods where Option<ArenaVec> is expected #24629) (overlookmotel)
• 77230c5 ast: Accept arrays for ArenaVec params of AST builder methods (feat(ast): accept arrays for ArenaVec params of AST builder methods #24621) (overlookmotel)
• f08b152 allocator: Implement FromIn for array to Vec conversion (feat(allocator): implement FromIn for array to Vec conversion #24620) (overlookmotel)
• 2338c13 track-memory-allocations: Track heap deallocs, alloc bytes, and peak growth (feat(track-memory-allocations): track heap deallocs, alloc bytes, and peak growth #24619) (Boshen)
• 7aa4739 syntax,transformer: Move JSX entity decoder to oxc_syntax (feat(syntax,transformer): move JSX entity decoder to oxc_syntax #24617) (camc314)
• 2b097c4 str: Export Str as ArenaStr (feat(str): export Str as ArenaStr #24604) (overlookmotel)
• 3acf4c1 minifier: Expand switch optimiation to remove empty cases (feat(minifier): expand switch optimiation to remove empty cases #24520) (Armano)
• 129b759 parser: Improve diagnostics for unparenthesized LHS on exponential expr (feat(parser): improve diagnostics for unparenthesized LHS on exponential expr #24569) (camc314)
• 4d0c601 minifier: Fold arithmetic over undefined and null operands (feat(minifier): fold arithmetic over undefined and null operands #24485) (Dunqing)
• 91541dd minifier: Drop empty switch statements (feat(minifier): drop empty switch statements  #24527) (Armano)
• d05224d ast_visit: Generate VisitJs visitor that skips TypeScript type-space (feat(ast_visit): generate VisitJs visitor that skips TypeScript type-space #24499) (Boshen)
• 3d22307 parser: Add ParseOptions::enable_ident_hashes (feat(parser): add ParseOptions::enable_ident_hashes #24491) (Boshen)

🐛 Bug Fixes

• 64c2241 minifier: Align class heritage removal with assumptions (fix(minifier): align class heritage removal with assumptions #24533) (Dunqing)
• 48b59f4 parser: Span ambient generator diagnostics (fix(parser): span ambient generator diagnostics #24711) (camc314)
• e750a82 ecmascript: Fix false negative for may_have_side_effects on dynamic property access (fix(ecmascript): fix false negative for may_have_side_effects on dynamic property access #24709) (sapphi-red)
• f145d73 minifier: Guard reordered identifier reads (fix(minifier): guard reordered identifier reads #24698) (Dunqing)
• a2ef382 isolated-declarations: Reject window.Symbol as global symbol reference (fix(isolated-declarations): reject window.Symbol as global symbol reference #24689) (camc314)
• b1bcf72 minifier: Invalidate facts for redeclared bindings (fix(minifier): invalidate facts for redeclared bindings #24658) (Dunqing)
• 921b834 minifier: Don't treat a conditionally-assigned var as write-once (fix(minifier): don't treat a conditionally-assigned var as write-once #24650) (Dunqing)
• 061af1f minifier: Avoid stale pure function summaries (fix(minifier): avoid stale pure function summaries #24636) (Dunqing)
• 40c2f43 allocator: Vec::from_array_in do not allocate zero-length array (fix(allocator): Vec::from_array_in do not allocate zero-length array #24628) (overlookmotel)
• 70994ae codegen: Preserve comments before expression operands (fix(codegen): preserve comments before expression operands #24510) (Dunqing)
• 7b4baff parser: Reject new import member access (fix(parser): reject new import member access #23459) (camc314)
• 128b385 minifier: Clippy warning with no-debug-assertions (fix(minifier): clippy warning with no-debug-assertions #24547) (camc314)
• 8421feb parser: Use first as span for imported name (fix(parser): use first as span for imported name #24537) (leaysgur)
• c517aa0 parser: Reject invalid accessor assertions (fix(parser): reject invalid accessor assertions #24504) (camc314)

⚡ Performance

• 884d9eb parser: Pre-size cover-grammar assignment target buffers (perf(parser): pre-size cover-grammar assignment target buffers #24683) (Boshen)
• d3f07a0 diagnostics: Box OxcDiagnosticInner to reduce binary size (perf(diagnostics): box OxcDiagnosticInner to reduce binary size #24665) (Boshen)
• bcc9de0 parser: Defer diagnostic creation until parse exit (perf(parser): defer diagnostic creation until parse exit #24663) (Boshen)
• c35d8ab allocator: Mark ReplaceWith panic path cold (perf(allocator): mark ReplaceWith panic path cold #24515) (camc314)
• ba65790 semantic, allocator: Branchless clone_in for semantic IDs (perf(semantic, allocator): branchless clone_in for semantic IDs #24564) (overlookmotel)
• 747feec parser: Build AST nodes with the AST builder instead of cloning (perf(parser): build AST nodes with the AST builder instead of cloning #24540) (Boshen)
• ba35a0d react_compiler: Use IndexVec for dense id-keyed maps (perf(react_compiler): use IndexVec for dense id-keyed maps #24549) (Boshen)
• b685062 react_compiler: Keep small hot-path collections inline (perf(react_compiler): keep small hot-path collections inline #24514) (Marius Schulz)
• a149e95 transformer: Outline rare expression exits (perf(transformer): outline rare expression exits #24512) (camc314)
• 7808a6e react_compiler: Make aliasing effects cheap to intern and clone (perf(react_compiler): make aliasing effects cheap to intern and clone #24506) (Marius Schulz)
• 3a36f2a react_compiler: Store AbstractValue reasons as a u16 bitmask (perf(react_compiler): store AbstractValue reasons as a u16 bitmask #24480) (Boshen)
• 1c96753 react_compiler: Use FxHashMap for the lookup-only aliasing node map (perf(react_compiler): use FxHashMap for the lookup-only aliasing node map #24490) (Boshen)