]> > in case you're doing so this way: > ocamlc -o my.cma mod1.ml mod2.ml mod3.ml mod4.ml > > this will recompile everything, > but you can use in your makefile: > (...) > then you don't recompile everything, only the modified module > Yes, with ocamlbuild I need not to recompile everything, but it's slow traversing even nothing-to-be-done tree: Finished, 432 targets (411 cached) in 00:00:08. It takes already 8 seconds if nothing is touched. If I edit few files, it's worse: Finished, 432 targets (256 cached) in 00:00:49. I'm looking for alternatives. That's why I try with scripting: keep core libraries compiled and run outermost parts with an interpreter. Another idea is to change ocamlbuild to work dynamically: keep the dependency tree in memory and update it from time to time, watching files on disk. Dawid