How much better are 64 but platforms

[Michel TALON]

On Wed, 29 Oct 2003, Bill Moran wrote:

...

In the special case of the AMD64, which can run in 32 bits mode and 64
bits mode, choosing 64 bits mode not only means larger registers,
possibly more traffic on the memory bus, potentially detrimental to
performance, but also more registers, etc. This has the potential
to give improved perfs, and indeed people speak of improvements of the
order of 10 to 20% for "ordinary" programs, much more of course if you
have enormous data sets requiring more than 4 gigs of memory to avoid
swap.


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Michel TALON