Version française
Home     About     Download     Resources     Contact us    
Browse thread
32- and 64-bit performance
[ Home ] [ Index: by date | by threads ]
[ Search: ]

[ Message by date: previous | next ] [ Message in thread: previous | next ] [ Thread: previous | next ]
Date: -- (:)
From: Alex Baretta <alex@b...>
Subject: Re: [Caml-list] 32- and 64-bit performance
Ville-Pertti Keinonen wrote:
> On Wed, 2005-03-30 at 09:46 +0200, Alex Baretta wrote:
> 
> 64-bit data structures (due to bigger pointers, alignment, and in OCaml
> bigger default integers) are bigger, so things that are constrained by
> memory bandwidth are obviously going to be faster as 32-bit.
> 
> On other architectures where you can use 32-bit or 64-bit that are
> otherwise identical, 32-bit is generally faster.

Ah, obviously! But this seems to imply that a 32-bit machine/compiler 
couple would be generally faster on symbolic processing algorithms, 
which generally require a good deal of memory allocations/deallocations. 
Since this is the kind of code which seems to be most idiomatic in 
Ocaml, I wonder how well or how badly 64 bits will actually impact all 
our software.

Alex

-- 
*********************************************************************
http://www.barettadeit.com/
Baretta DE&IT
A division of Baretta SRL

tel. +39 02 370 111 55
fax. +39 02 370 111 54

Our technology:

The Application System/Xcaml (AS/Xcaml)
<http://www.asxcaml.org/>

The FreerP Project
<http://www.freerp.org/>