Features » Speed

You can check how fast OCaml is at Doug Bagley's Great Computer Language Shootout: OCaml compiled as native code came 2nd, just after C and before C++.

The updated version of the Shootout shows OCaml doing almost as well (not as much attention has been paid to the OCaml programs in the updated version).

The INRIA official OCaml website has a page on optimising OCaml programs for speed and one on writing efficient numerical code.