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On Wed, 18 Mar 2009 04:21:22 -0400, Warp wrote:
> Jim Henderson <nos### [at] nospam com> wrote:
>> Generally 64-bit and 32-bit performance are going to be very similar;
>> the advantage to 64-bit systems is the ability to address more memory.
>
> Except that the x86-64 architecture has more processor registers than
> the x86-32 architecture, which means that 64-bit executables can be
> optimized by the compiler better than 32-bit ones. This can cause a
> measurable difference in speed.
>
> (OTOH 64-bit programs will inherently consume more memory than 32-bit
> ones, which may also affect speed the other way around. Which one is
> more significant with POV-Ray, hard to say. I'd say the registers
> probably win, though.)
Interesting, now that's something I didn't know.
Jim
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