TypeScript - Performance & Compiler Speed

Compiler performance

• Enable incremental and use tsc -b in monorepos.
• Use skipLibCheck to avoid checking third-party types.
• Avoid huge union types in hot paths; prefer lookup maps.

Transpile vs typecheck

• For dev servers, use SWC/ESBuild + tsc --noEmit in parallel.

Editor performance

• Limit number of open workspaces, exclude large generated folders, and keep node_modules out of include.