I've been doing a lot of SwiftUI stuff lately and the compilation times are pretty crap even for simple applications. Change one line and it's a minute or two of compilation again.

Then there's this fucker for whenever you make a programming error involving types:

>The compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions

Basically, your code has a type error somewhere in it, and you need to figure out where and how it's wrong.