On Tue, 3 Jun 2008 07:32:17 +0100 jpff <jpff@codemist.co.uk> wrote:
no significative performance enhancement versus 32 bit system (on 64 bits machines).
Not our experience. 64 bit computing wins significantly.
I've been using 64-bits for over 15 years (Tru64 Unix on the Alpha chip). 64-bits does not guarantee a performance advantage. I have found through benchmarking and other testing that in some cases 64-bits will improve performance, and in other cases that 64-bits will hurt performance. In my own company's product. We are very memory intensive, but after porting it to 64-bits on an Itanium processor, we still could not beat the 32-bit application on x86. However, based on experience, Linux, built for x86-64 does perform better. Certainly memory management is better, but also you are dealing with double the registers. -- -- Jerry Feldman <gaf@blu.org> Boston Linux and Unix PGP key id: 537C5846 PGP Key fingerprint: 3D1B 8377 A3C0 A5F2 ECBB CA3B 4607 4319 537C 5846