[cairo] Cairo 1.3 performance loss

[David Turner]

> > Can you recommend what should be changed in cairo-perf to make it more
> > useful on your platform? Are you just saying that your timer
> > granularity is coarse enough that each individual test should be
> > adjusted to take more time?
> 
> Yeap. One idea would be to add a mode that times X iterations instead of
> single ones, pretty much like my little tool above does.
> 
This already exists, either use the "-i NNN" command line flag, or
define the CAIRO_PERF_ITERATIONS environment variable with the number
of iterations you want.

Hope this helps,

- David