Build times are a bit slow, but runtime is just as fast as what you'd get doing the same thing in C or C++.
Development time is absurdly faster, though, since you don't spend much time debugging annoying language-design bugs, and can focus entirely in your code's logic.
Development time is absurdly faster, though, since you don't spend much time debugging annoying language-design bugs, and can focus entirely in your code's logic.