The answer really is "it depends". On x86-64, the big advantage to 64-bit performance-wise is the additional CPU registers that it enables. The downside is the additional memory usage due to bigger pointer sizes. From what I understand, this increased size can have negative effects on CPU cache hit rates.
-Dustin On Fri, Jun 24, 2011 at 7:02 AM, Michael Stapleton <michael.staple...@techsologic.com> wrote: > While we are talking about 32 | 64 bit processes; > Which one is better? > Faster? > More efficient? > > Mike > > > On Thu, 2011-06-23 at 13:59 +0100, Deano wrote: > >> Windows made the shift last server release (2008r2 is x64 only). >> >> So it's only the OSS server families which support 32bit, likely because >> both BSD and Linux support lots of platforms outside of x86. >> >> Deano >> >> -----Original Message----- >> From: Gary Driggs [mailto:gdri...@gmail.com] >> Sent: 23 June 2011 02:10 >> To: Discussion list for OpenIndiana >> Subject: Re: [OpenIndiana-discuss] oracle removes 32bit x86 cpu support for >> solaris 11 will OI do same? >> >> FWIW, Mac OS X Lion will only support x64 as well. IMHO, this is a good move >> for modern operating systems since there are always going to be alternatives >> for those still using i386 architecture. How long has Solaris/SPARC been >> 64-bit? At least ten years if not more... >> >> -Gary >> _______________________________________________ >> OpenIndiana-discuss mailing list >> OpenIndiana-discuss@openindiana.org >> http://openindiana.org/mailman/listinfo/openindiana-discuss >> >> >> _______________________________________________ >> OpenIndiana-discuss mailing list >> OpenIndiana-discuss@openindiana.org >> http://openindiana.org/mailman/listinfo/openindiana-discuss > > > _______________________________________________ > OpenIndiana-discuss mailing list > OpenIndiana-discuss@openindiana.org > http://openindiana.org/mailman/listinfo/openindiana-discuss > _______________________________________________ OpenIndiana-discuss mailing list OpenIndiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss