oxc-project__oxc/crates/oxc_minifier/docs/ROADMAP.md

Development Roadmap

Phase 1: Foundation ✓

• Basic peephole optimizations
• Constant folding
• Dead code elimination
• Test infrastructure (minsize, coverage, e2e)
• Fixed-point iteration

Phase 2: Complete Optimization Suite ✓

• Port safe optimizations from Closure Compiler
• Port core optimizations from Terser/UglifyJS
• Advanced constant propagation
• Cross-statement optimizations
• Template literal optimization
• Array/object patterns

Phase 3: Advanced Optimizations (Current)

• Function inlining (when provably safe)
• Switch statement optimization
• Advanced string concatenation (extending oxc_ecmascript string operations)
• Enum unboxing
• Property collapsing
• Better RegExp optimization
• Loop optimizations
• Cross-module optimization
• Perfect side effect analysis (extending oxc_ecmascript capabilities)
• Advanced DCE with escape analysis
• Type-aware optimizations (from TS types)
• Framework-specific optimizations (React, Vue, Angular)

Phase 4: Production Ready

• Differential testing framework
• Fuzzing infrastructure
• Performance optimization
• Source map improvements
• Custom optimization plugins

Goals

Size: Beat Closure Compiler, smallest output for top npm packages Correctness: 100% test262/Babel/TypeScript conformance Performance: < 2x slower than esbuild, < 10x faster than Terser Adoption: Integration in major build tools

Contributing

• Port optimizations from Closure Compiler, Terser, esbuild
• Test with real-world code and report issues
• Performance profiling and optimization
• Documentation improvements

See CONTRIBUTING.md for guidelines.