Ok those numbers match for me. Tcc is indeed incredibly faster (<0.2 seconds for me) although I've had to fix the code to make it build. Your machine seems to be about 1.5-2x faster than mine. I can get gcc to build in 8 seconds (instead of 27) by not requesting -Wall. Clang is more like 4 seconds, and MSVC more like 3 seconds on my machine. All that is without optimizations.