[cairo] _cairo_lround (and effects on positioning of text)

[Carl Worth]

On Tue, 21 Nov 2006 17:37:02 -0800, Carl Worth wrote:
> So I've got cairo-perf results coming from the three patchsets on the
> n770 now, (cairo-perf sure takes a long time there---maybe we should
> eliminate some redundancy in the perf suite to make it run faster). On
> my x86 it seems only faster, (perhaps as much as 1.2x faster which
> isn't so bad considering this isn't the platform being targeted at
> all).

From the testing I've been doing on the n770 I've seen the performance
of the text tests all improve, from as little as 1.01x to as much as
1.77x with these three patches.

The tests that improve the least are those that have linear and radial
gradients, (where it's not surprising that the gradient computation is
still overwhelming any benefit from the reduced floating-point
computation in these patches).

-Carl
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