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From the release notes:
This is the fifth development snapshot in the 1.3 series. It comes 9
days after the 1.3.8 snapshot, and still well within our goal of
having a new snapshot every week, (though don't expect one next
week---we'll all be too stuffed with sugar plums).
Speaking of sugar plums, there's a sweet treat waiting in this cairo
snapshot---greatly improved performance for stroking rectilinear
shapes, like the ever common rectangle:
image-rgb box-outline-stroke-100 0.18 -> 0.01: 25.58x speedup
In past releases of cairo, some people had noticed that using
cairo_stroke to draw rectilinear shapes could be awfully slow. Many
people had worked around this by using cairo_fill with a more complex
path and gotten a 5-15x performance benefit from that.
If you're one of those people, please rip that workaround out, as now
the more natural use of cairo_stroke should be 1.2-2x faster than the
unnatural use of cairo_fill.
And if you hadn't ever implemented that workaround, then you just
might get to see your stroked rectangles now get drawn 5-25x faster.
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