You'd probably be better off with TCC or with GCC with -O0. Assembly can only outrun C when the programmer uses context-aware optimizations. If you're just using generic macros everywhere to piece together a solution you may as well just use a high-level language.
Oh, I wasn't thinking of optimized code. It just sounds kind of fun. And it would still probably still beat anything that doesn't target machine code. But yeah, the compiler is going to produce better code than I can in most cases.
