Re: Debian AMD64
On Fri, Jan 09, 2009 at 01:30:02PM -0600, Ron Johnson wrote:
> The only benefit which x86-64 has in 64-bit mode is extra registers. But
> that only benefits computationally-intensive programs.
Those actually help just about anywwhere. As long as your compiler knows
how to use them. And it does. Not using registers: reading from memory,
and this is slower.
OTOH, using larger pointer wastes more memory, and hence a larger chance
of cache misses. Which is why this benefit is not automatic.
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