[cairo] Very slow performance

[Soeren Sandmann]

Keith Packard <keithp at keithp.com> writes:

> I think MMX or SSE might be able to get better memory bandwidth than the 
> current dumb loop.  Experimentation would be welcome.

In my tests when I did the MMX stuff in xorg, 128 bit reads/writes
were not an improvement over 64 bit read/writes on the systems I
tested on. On some - but not all - systems, 64 bit was an improvement
over 32 bit.


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