While I totally agree with you, I'm looking for a counter example. The only one which comes to my mind, is non trivial and quite fast for js/ts is this : https://github.com/tsoding/raycasting An implementation of raycast in a 2D canvas The dev tried to implement hot reloading, and you can see all the process there https://www.youtube.com/playlist?list=PLpM-Dvs8t0VZ08cYW6yqN...

Even though I didn't measured the loading time, an effort has been made to accelerate everything that could be accelerated.

Even the simplest type inference can cause typescript to stall for minutes. The problem is in the inference. That problem goes away when you're actually specifying types. Tooling should add typing automatically (not implicitly)

Minutes? There’s no way you’ve seen a minutes-long stall caused by TypeScript inference..I need to see some evidence on this one

I'll look into it.. But yeah, had that multiple times (older versions though). Specifying the type solves is, and I was not the only one after some googling