Re: [PATCH RFC] [X86] performance improvement for memcpy_64.S by fast string.

Andi Kleen
2009-11-06T16:51:29Z

ling.ma@intel.com writes:

> Intel Nehalem improves the performance of REP strings significantly
> over previous microarchitectures in several ways:

The problem is that it's not necessarily a win on older CPUs to
do it this way.

-Andi

--
ak@linux.intel.com -- Speaking for myself only.