performance.md

title	Performance

These tricks will make ts-node faster.

Skip typechecking

It is often better to use tsc --noEmit to typecheck as part of your tests or linting. In these cases, ts-node can skip typechecking.

• Enable swc
  • This is by far the fastest option
• Enable transpileOnly to skip typechecking without swc

With typechecking

• Avoid dynamic require() which may trigger repeated typechecking; prefer import
• Try with and without --files; one may be faster depending on your project
• Check tsc --showConfig; make sure all executed files are included
• Enable skipLibCheck
• Set a types array to avoid loading unnecessary @types