Actually, the reason Apple sponsored Clang/LLVM is because Apple engineers were unhappy with GCC's build times[1]. If you need to rebuild an entire operating sy

Actually, the reason Apple sponsored Clang/LLVM is because Apple engineers were unhappy with GCC's build times[1]. If you need to rebuild an entire operating system (kernel and userland) every day, your C compiler's build performance matters a lot. [1] http://www.imore.com/debug-48-melton-ganatra-episode-ii-understanding-apple http://www.imore.com/debug-48-melton-ganatra-episode-ii-unde...