You say this as if fast compilation speed somehow means bad performance.

This is a false dichotomy. Pascal compiles fast and runs fast.

Then there's the fact that performance of a program depends on far more things than the language it's written in — and faster iteration cycles ease optimization and profiling on the level of algorithms, which is where you have most gains.

Squeezing that potential 3% speed up from using another language is rarely worth it then.