[cairo] Regression in long random polyline rendering time

[Emmanuel Pacaud]

Le samedi 26 septembre 2009 à 09:45 +0200, Emmanuel Pacaud a écrit : 
> I have another example which exhibits this regression. It consists in
> drawing a noisy sinusoid y = sin (x) + rand() * noise_amplitude. You are
> right, the new rendering is nicer. But sooo slow... And unfortunately,
> in this case, it's something you may actually have to draw in real
> life. 

Here's a test code Joonas wrote that renders a noisy sinusoid. Cairo
master is slow only when CAIRO_LINE_JOIN_ROUND is used though, with
n-iterations > 50000.

Emmanuel.
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