Just to add to #4, I've worked on some large codebases where transpilation starts taking a very long time, and I begin to think "wow, this is really straining TSC"... so far, every time it's happened, it's been because some sort of data files weren't being excluded from the build.
Idk if I’m just an idiot but my company’s codebase for the last year has had pretty slow tsc compile times and nobody on my team has been able to make it better. Probably since we have a decent amount of generated code that pushes the amount of source code up considerably, but still no good answers to make that better.
I don't do anything with generated code. But is it necessary to generate that code every time TSC does a build? Could it be independent? I usually use two different ts export indexes, and create two dist JS files for each app. Most of the boilerplate that rarely gets touched (user management, login and signup screens, common UI elements, utility code) is essentially in an outer JS file that loads the inner JS with the business logic and meat of the app, but has no imports from the inner JS whatsoever. They're basically two separate projects. Not that I've noticed much difference with tsc, but it makes webpack or r.js faster if you can create separate webs of dependencies and only need to repack one of them without touching the other...
