From: "Alexander S. Usov" <A.S.Usov@KVI.nl>
To: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] 32- and 64-bit performance
Date: Wed, 30 Mar 2005 10:11:23 +0200 [thread overview]
Message-ID: <200503301011.23639.A.S.Usov@kvi.nl> (raw)
In-Reply-To: <424A593A.5050608@barettadeit.com>
On Wednesday 30 March 2005 09:46, Alex Baretta wrote:
> Jon Harrop wrote:
> > So ocamlopt does seem to generate significantly better code in these
> > examples, particularly when they are floating point intensive. Also, only
> > one test is slower in 64-bit, due to its heavy use of trees.
>
> Why do you suppose is there *any* benchmark faster in 32 bit mode than
> in 64 bit mode on the Athlon64? Since the AMD64 architecture is
> generally better than IA32--were it only for the additional registers--I
> would expect all benchmarks to run as fast or faster when compiled to
> the AMD64 instruction set.
A one of the simplest reasons -- somewhat increased memory use.
And memory access is incredibly expensive novadays.
--
Best regards,
Alexander.
next prev parent reply other threads:[~2005-03-30 9:11 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-30 2:40 Jon Harrop
2005-03-30 7:46 ` [Caml-list] " Alex Baretta
2005-03-30 8:00 ` Ville-Pertti Keinonen
2005-03-30 8:41 ` Alex Baretta
2005-03-30 9:01 ` Ville-Pertti Keinonen
2005-03-30 12:53 ` Jon Harrop
2005-03-30 14:34 ` Ville-Pertti Keinonen
2005-03-30 8:10 ` Robert Roessler
2005-03-30 8:11 ` Alexander S. Usov [this message]
2005-03-30 13:46 ` Eijiro Sumii
2005-03-31 13:42 ` Jon Harrop
2005-03-31 15:05 ` Stefan Monnier
2005-03-31 18:40 ` [Caml-list] " Jon Harrop
2005-03-31 22:41 ` Richard Jones
2005-04-02 20:23 ` Stefan Monnier
2005-04-02 20:50 ` [Caml-list] " David Brown
2005-04-03 10:01 ` Ville-Pertti Keinonen
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