[cairo] Added mmx fast path for fbComposeCopyAreammx

[Soeren Sandmann]

Carl Worth <cworth at cworth.org> writes:

> I definitely want to have the performance suite be reliable without
> people having to manually tweak things. And maybe my original idea to
> run a minimal number of iterations until the results stabilized was
> fundamentally flawed. If so, maybe we should remove all of that
> support completely.
> 
> But meanwhile, I'm failing to see how your patch changes the results
> for you given the way you're running things. Am I totally missing
> something?

No, you are right. When you explicitly give "-i number" it doesn't
compute statistics in between iterations. So my patch is definitely
flawed.

I do think that whatever it is that causes people to report
"performance tests" with 3 or 7 iterations, should go away.


Soren