> He's doing real-time audio processing. So, first, he's got performance issues. FFTW, long the fastest FFT software available, is a program written in OCaml t

> He's doing real-time audio processing. So, first, he's got performance issues. FFTW, long the fastest FFT software available, is a program written in OCaml that generates C. You need to think more outside the box! Another example: Copilot is a Haskell EDSL that generates a hard real-time C program for avionics. You can write programs functionally and get your imperative performance too.