If you're OK with serial C getting beat by a functional language, I have some simple benchmarks here: http://futhark-lang.org/performance.html http://futhark-la

If you're OK with serial C getting beat by a functional language, I have some simple benchmarks here: http://futhark-lang.org/performance.html http://futhark-lang.org/performance.html It also shows some parallel C being almost beat by a functional language, albeit one that is very specifically designed for parallel performance.