Porting the TypeScript Compiler to Go for a 10x Speedup V2
summary
Ports 150,000+ lines of TypeScript and 90,000 tests into Go, using a TS-to-Go tool to convert code, a node arena pool to cut allocations (parsing shows ~96% fewer allocations and a 20% boost), and multiple concurrent checkers so parsing is 3–4x faster single-threaded and over 10x with all cores. VS Code compile drops from ~80s to ~7s in early runs; Slack build goes from ~6min to ~40s and Figma sees ~5x speedup. Race detector and an immutable snapshot model eliminate concurrency bugs.
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chapters (20)
- 0:00Introduction to TypeScript
- 1:04TypeScript's Scale and Impact
- 2:29Challenges of JavaScript
- 4:46The Need for a New Compiler
- 7:24Language Choice and Requirements
- 8:55Porting Process and Tools
- 11:50Initial Results and Team Growth
- 13:24Community Reaction
- 14:56Testing Infrastructure
- 16:53Data Structures in Go
- 20:59Performance Optimization Techniques
- 22:38Handling String Encoding
- 24:13Compiler Concurrency Design
- 27:48Addressing Concurrency Bugs
- 29:24Language Server Improvements
- 31:26Go-Specific Challenges
- 33:16Performance Gotchas and Fixes
- 35:50Features Left Behind
- 36:30Current Status and Impact
- 37:40Future Work and Conclusion
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