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Subject: Re: [Caml-list] Behaviour of an OCaml program: any possible GC
 improvement?

On 10/24/2012 01:08 PM, David MENTRE wrote:
> Hello,
> 
> I'm using OCaml 3.11.2 on Linux (Debian Squeeze 6.0) x86_64 platform.
> 
> I have a program that exhibits the following gprof profile. A lot of
> time is spent in the GC (more than 56 %). Is there anything I can do
> with respect to the GC? Otherwise, this program is a typical symbolic
> manipulation program, handling trees made of Sum types and small lists
> of them (1 to 3 elements).

You can try tuning the Gc parameters:
http://caml.inria.fr/pub/docs/old-311/libref/Gc.html

Try increasing minor_heap_size, and major_heap_increment and see if there is any improvement.
Also look at Gc.stat() and see how many major collections and live words you have.

--Edwin