You need to uncomment the line 107 with Thread calls so that it is
effectively linked to threads I think and see the difference !

I will try the profiling !

Rémi

On Tue, Feb 17, 2009 at 09:59, Mark Shinwell <mshinwell@janestcapital.com>wrote:

> On Tue, Feb 17, 2009 at 08:40:11AM +0100, Rémi Dewitte wrote:
> > I have made some further experiments.
> > I have a functional version of the reading algorithm. I have the original
> > imperative version of the algorithm.
> > Either it is linked to thread (T) or not (X). Either it uses extlib (E)
> or
> > not (X).
>
> Using:
>
> ocamlopt -o foo transf.ml
> ocamlopt -thread -o foothread transf.ml unix.cmxa threads.cmxa
>
> on local disk with a 24Mb, approx. 500,000-line CSV file, I only see a
> minor slowdown with foothread as opposed to foo.  (A minor slowdown would
> inded be expected.)  So I'm confused as to why your results are so
> different.
>
> You could use ocamlopt -p and run gprof on the resulting gmon.out file.
>
> Mark
>