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From Christopher Schultz <ch...@christopherschultz.net>
Subject Re: [OT] Followup on 32-bit versus 64-bit performance discussion(s)
Date Mon, 14 Mar 2011 21:08:51 GMT
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Justin,

On 3/14/2011 3:45 PM, Justin Randall wrote:
> In general, it is technically possible for a 32-bit application to
> perform faster than a 64-bit application when running on a 64-bit CPU
> because of CPU memory cache behaviour.

Also due to the amount of data that can be transferred at once across
the data paths to the CPU: 64-bit pointers simply take up more bandwidth
on those paths.

A 32-bit process, using 32-bit pointers, will enjoy a 2x speedup for
those types of data.

- -chris
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