Erik Funkenbusch <erik@xxxxxxxxxxxxxxxxxxxxxx> did eloquently scribble:
> And it ws interesting that 32 bit performance seemed to be significantly
> better in 2 of the 3 benchmarks than 64 bit.
Not really that interesting.
It's to be expected. 64 bit programs are pushing around twice as much RAM,
so, even WITH the extra registers and instructions that're available, some
types of programs will be a slower on 64 than 32.
Some will be faster, it can depend not only on how they were written and/or
compiled but what they're actually meant to do.
If most of the processing takes place on chip without shunting around lots
of DATA to/from memory, the 64 bit will win hands down if the program can
make use of the extra registers. Specially if there's a lot of large number
integer multiplications/divisions that break the 32 bit boundary.
--
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