Nim is actually one of the fastest to compile out of the compiled languages out there, on par with Go. Although this is a bit subjective, I think a second of compilation is good enough for light scripting tasks. (And being a statically-typed languages it catches a good chunk of errors before compilation is finished.)

Nim's advantage is that it uses a good old C compiler for the backend (which has been hyperoptimized for decades), but the frontend (transpiler) is also pretty fast. Nim's compilation speed should improve a bit when incremental compilation support is added (which would probably solve a lot of other current issues for Nim, for example better IDE tooling)