Indeed using the improved OCaml inliner (http://www.ocamlpro.com/blog/2013/07/11/inlining-progress-report.html http://www.ocamlpro.com/blog/2013/07/11/inlining-

Indeed using the improved OCaml inliner (http://www.ocamlpro.com/blog/2013/07/11/inlining-progress-report.html http://www.ocamlpro.com/blog/2013/07/11/inlining-progress-re...) on the original OCaml gives a speedup of 2.75.