Per Nick's comment, above, Red likely won't generate C, because that would add a dependency on a C toolchain. Red is completely self-contained, and would like to stay that way. However, you could write those tight bits in C and put them in a DLL or something, to call from Red.
It has an FFI, but no static linking to C libs at this time. Not sure if that will come, but technically it's possible, as Red's linker is written in Red/System. I'm a huge fan of Pieter Hintjens' work, and have written lots of code generators and FSM stuff, inspired by GSL and Libero.
