Dnia poniedziałek, 18 września 2006 17:49, Richard Fish napisał: > You'll only notice a speed increase with applications that need to > caculate very large numbers, like encryption keys and certain > scientific apps. Everything else will basically run just as fast in > 32-bit mode as it will in 64-bit. There are exceptions in certain > media encoders that don't have hardware optimizations for 64-bit, that > may actually run faster as 32-bit apps.
Well, the registers are not only twice longer, but there is twice as much of them as in 32-bit. And THIS is what optimising compilers are fond of. More registers mean less in-memory temporary variables, which in turn means less memory accesses. This gives speed improvement. For SMP systems it gives huge difference - as the memory is shared between CPUs and they must fight for it. I have an amd64 system for over a year (or is it 2-yrs?). I had some glitches: * Need to use binary 32-bit firefox to have flash - still have problems with some fonts not appearing in flash * Need to use 32-bit java to make 32-bit OpenOffice happy * Some forensic packages won't compile on 64-bit due to bad coding techniques But besides that - my AMD64 3000+ just rocks. I had definitely much more problems with 64-bit XP, but since getting rid of it (XP not problems) I am fully 64-bit positive :D -- Pawel Kraszewski www.kraszewscy.net -- [email protected] mailing list
