TypeScript 7 Is Here (And It's 10× Faster)
TypeScript 7 compiles large codebases 10-12x faster via parallel native type checking
“We actually by default spin up four type checkers and run them concurrently and have them each check a quarter of the file.”
Microsoft's TypeScript 7 delivers 10-12x compile speed improvements over TypeScript 6 by running multiple type checkers in parallel and leveraging native execution. A demo compiling VS Code's 1.3 million-line codebase dropped from 50 seconds to 4.5 seconds with 16 cores. Relevant to AI developers as TypeScript is the dominant language for Claude SDKs, MCP tooling, and AI application development.