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lensman3 · 04-22-2008, 07:29 PM

Interesting point by M$ and is probably true. 64-bit programs are about 20% larger than the equivalent 32-bit (I'm comparing Linux installs). I'm not sure that the Intel or AMD hardware is doing 64-bit instruction fetches from memory. If they are doing 32-bit fetches and putting them together to make 64-bit then the software probably runs at 1/2 the speed. Is the data bus really 64-bits? Anybody know?

I work in GIS and use ArcGIS and Autocad everyday. I know that the 32-bit version of these programs have about hit the performance wall when rendering large drawings. The only place, I think, that performance can improve is in the 64-bit arena. A large drawing can use up more the 4 Gbytes of in data space.

04-22-2008, 07:29 PM	#3 (permalink)
lensman3 Registered User Join Date: Oct 2007 Location: Littleton, Colorado USA Posts: 385 OS: xp 64 sp2 Fedora Core 8 (vmware xp core 8 x32) Minix	Re: Program Addressing Limit Interesting point by M$ and is probably true. 64-bit programs are about 20% larger than the equivalent 32-bit (I'm comparing Linux installs). I'm not sure that the Intel or AMD hardware is doing 64-bit instruction fetches from memory. If they are doing 32-bit fetches and putting them together to make 64-bit then the software probably runs at 1/2 the speed. Is the data bus really 64-bits? Anybody know? I work in GIS and use ArcGIS and Autocad everyday. I know that the 32-bit version of these programs have about hit the performance wall when rendering large drawings. The only place, I think, that performance can improve is in the 64-bit arena. A large drawing can use up more the 4 Gbytes of in data space.