On Fri, Mar 17, 2006 at 08:56:58AM -0800, Steve Atkins wrote: > 64 bit binaries usually run marginally slower than 32 bit binaries. This depends a bit on the application, and what you mean by "64 bit" (ie. what architecture). Some specialized applications actually benefit from having a 64-bit native data type (especially stuff working with a small amount of bitfields -- think an anagram program), but Postgres is probably not among them unless you do lots of arithmetic on bigints. amd64 has the added benefit that you get twice as many registers available in 64-bit mode (16 vs. 8 -- the benefit gets even bigger when you consider that a few of those go to stack pointers etc.), so in some code you might get a few percent extra from that, too. /* Steinar */ -- Homepage: http://www.sesse.net/
