I put a post on our blog a little while back discussing this.  <br><br>   <a href="http://ocaml.janestreet.com/?q=node/71">http://ocaml.janestreet.com/?q=node/71</a><br><br>There are a number of tricks you can do, including loop unrolling, and using a counter to keep track of the number of stack frames, to get code that behaves well on small-to-medium lists, uses a bounded number of stack frames, and is faster than the standard List.map even for small lists.<br>
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