Joshua Boyd <jdboyd@xxxxxxxxxx> writes: > On Tue, Aug 16, 2005 at 10:25:15AM +0100, Steve Harris wrote: > >> Unless you've got more than 3 gig of ram I doubt it will make much >> difference. 32bit binaries are smaller, and hence faster, but there are a >> couple of 64bit only instructions that the compiler might use that could >> give some speed benefit. >> >> If you try it, why dont you measure the difference and tell us? >> >> Personally I'd be supprised if the 64bit version is measurably faster, but >> I'm often supprised :) > > You wouldn't expect the increase in register count to make a fairly > significant difference? More registers generally help, but so does a smaller cache footprint. Which matters more depends very much on exactly what you are doing. -- joq
