From: Doug Bagley <doug@bagley.org>
To: "Rolf Wester" <rolf.wester@ilt.fhg.de>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] OCaml speed
Date: Tue, 16 Oct 2001 16:43:50 -0500 [thread overview]
Message-ID: <15308.43542.739467.829866@ns.bagley.org> (raw)
In-Reply-To: <3BCB2D45.29070.4316C73C@localhost>
Rolf Wester wrote:
> Hi,
>
> I used the array access example from http://www.bagley.org/~doug/shootout/
> to compare c/c++ speed against ocaml. The sources I used are attached below.
> Unfortunately I could not confirm the given cpu times which are 0.11 sec for
> gcc and 0.13 for ocamlopt. My results on a Compaq Alpha True64 are
> 0.05 for cxx, 0.1 for g++ and 0.29 for ocamlopt. Does anybody have an idea
> what could be the reason for this inconsistency? Did I do anything wrong?
I don't think you are necessarily doing anything "wrong", but you are
testing in a manner quite differently from me.
Some ideas:
- Our architectures are quite different, I'm using an old PII-450Mhz.
- I time the programs externally, you time them internally.
- I compile the ocaml source with:
> ocamlopt -noassert -unsafe -ccopt -O3 ary.ml -o ary.run
You apparently compiled with:
> ocamlopt -o aa_ml unix.cmxa aa.ml
The last one is probably what makes the most difference.
Cheers,
Doug
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next prev parent reply other threads:[~2001-10-17 5:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-15 16:39 Rolf Wester
2001-10-16 21:33 ` Markus Mottl
2001-10-16 21:43 ` Doug Bagley [this message]
2001-10-30 16:24 ` Christophe Raffalli
2001-10-17 4:11 Jeremy Fincher
2001-10-17 8:01 ` Rolf Wester
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