Answering to myself, a colleague suggestion (from tsc doc actually): use tsc --noEmit (for type checking) and a fast compiler. tsc --noEmit duration is 2/3 of

Answering to myself, a colleague suggestion (from tsc doc actually): use tsc --noEmit (for type checking) and a fast compiler. tsc --noEmit duration is 2/3 of a normal build on our fairly large code base, so that can definitely speeds things up (for CI for example)