How to Optimize TypeScript 6.0 Compilation Time with Project References for 100-Repo Monorepos

Managing 100+ repositories in a monorepo setup is a scalability win for large teams, but TypeScript compilation can become a bottleneck as the codebase grows. TypeScript 6.0 introduces refined project references and incremental build improvements that, when configured correctly, can slash compilation times by up to 70% for massive monorepos.

What Are TypeScript Project References?

Project references let you split a TypeScript codebase into smaller, independent sub-projects, each with their own tsconfig.json . TypeScript only recompiles projects that have changed, or whose dependencies have changed, instead of rebuilding the entire monorepo every time.…