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

Andi Kleen
2009-11-09T18:54:31Z

> Ling's numbers didn't seem to show a significant slowdown on Core 2 (it
> was something like 0.95x baseline in the worst case, and most of the
> cases were positive) so Core 2 doesn't seem to have a problem.

I ran quite a lot of micro benchmarks with various alignments and sizes
the 'q' variant was not always a win. I haven't checked that particular
version though.

There's also K8 of course.

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