Here is my compilation script. ocamlbuild -use-ocamlfind XXX1.native XXX2.native ... init.native -ocamlopt "-inline 20" -ocamlopt -nodynlink And our tool always execute init.native. On Fri, Jul 17, 2015 at 2:50 PM, Kenneth Adam Miller < kennethadammiller@gmail.com> wrote: > Can you post your build specification? > > On Fri, Jul 17, 2015 at 2:35 PM, Shuai Wang > wrote: > >> Dear list, >> >> >> I am working on some tools written in OCaml (compiled by OCaml version >> 4.01.0). >> >> This morning I changed some code, compiled it and let it processing some >> large data (~ 4G), it never stops after over 2 hours. >> >> I feed the tool with a tiny input which took less than 1 second to >> process before, and I figured out that now it takes around 2.5 minutes >> before entering into "main" function! >> >> I tried to clean the whole codebase, and recompile it ( I use ocamlbuild >> 4.01.0), but the same wired situation still happens.. >> >> I did this: >> >> ltrace ./init.native input >> >> and I got this output flushing out for a very long time (sorry mail list >> blocks my large image.. ): >> >> http://i.stack.imgur.com/sEkKk.png >> >> >> >> Is anyone aware this kind of issue before..? Am I messed up something..? >> I have been working on OCaml for a relatively long time and I didn't >> encounter this kind of stuff before... >> >> >> Sincerely, >> Shuai >> > >