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Learn how to achieve dramatic performance improvements by porting large-scale compilers from one language to another in this 39-minute conference talk from GopherCon 2025. Discover the technical challenges and strategic decisions involved in migrating the TypeScript compiler's 150,000+ lines of code and 90,000+ tests from its original self-hosted implementation to Go. Explore the specific performance bottlenecks inherent to the original implementation language and understand why Go emerged as the optimal choice for this massive undertaking. Gain insights into the systematic approach used to handle such a large-scale code migration, including testing strategies, architectural considerations, and the lessons learned throughout the process. Understand the technical factors that contributed to achieving a 10x performance improvement and how these principles can be applied to similar compiler and tooling projects in your own development work.
