[forty]

I'm answering to you but this is really for most siblings:

I maintain a fairly large TS code base (nodejs backend). I think a full rebuild is 1:30 on my relatively recent laptop (i7-8650U, lots of RAM). But in practice I always use tsc -w and compile is mostly instant after editing a file (I do have to wait whenever I launch the command after I boot, but after that, it's fast enough).

tsc now support incremental compilation too, though I haven't played with it too much as I'm happy with watch mode.

[rezonant]

Incremental compilation is _okay_ but it seems to perform full rebuilds if the previous build is _too_ old which is weird- meaning that more builds than expected take the entire time to complete. Nonetheless I use it for all of my builds. On the other hand this may just be because of the spiraling nature of type inference, where TS needs to re-examine a large amount of the program from a change that appears simple.

Personally I only have a small number of projects that take more than 10-20 seconds to compile, but those ones are painful. I should probably do the same with -w for those.