I have built something similar like this for my fund 7 years ago. We were doing parametric optimization on large computational graphs. I have never programmed Ocaml but my understanding is introspection is kind of a weak spot for the language. Curious language choice! I know Ocaml is fast, about 1-2x speed of C, on par with Java.

Not trying to be pedantic but do you mean half the speed of C?