title: How to debug TypeScript compilation performance issues
body: <p>My TypeScript project has been going for a while now, and is quite large. Recently compile time performance has become significantly worse. I think it's likely that some of the 'neat' typing tricks that I've included somewhere are causing this. </p>
  
  <p>Unfortunately it's a large project, and includes many other large TypeScript dependencies, so it's hard to know the exact root cause.</p>
  
  <p>Are there any tools to debug TS compiler typechecking performance in situations like this? E.g. to see which files/types take TypeScript the most time to compile.</p>