What if you want to write fast programs fast?
Also, while not useful for command line tools or for small run once programs, if the software is running continuously or its size is past a certain threshold, it might pay off to use .NET or Java since the speed is not that far of from C.
https://benchmarksgame-team.pages.debian.net/benchmarksgame/...
https://benchmarksgame-team.pages.debian.net/benchmarksgame/...