[cairo-bugs] [Bug 31589] Very high cpu usage of _cairo_bentley_ottmann_tessellate_polygon() in transmission-gtk

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=31589

veldt <temp.20.nurkle at spamgourmet.com> changed:

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--- Comment #2 from veldt <temp.20.nurkle at spamgourmet.com> 2010-11-13 22:07:03 PST ---
(In reply to comment #1)
> In any case, the image backend uses a different rasterisation method in 1.10 so
> the regression doesn't occur as much, so a possible workaround might be to use
> a temporary image surface to render the strokes.

Indeed! The image backend uses only about 13% of the CPU time xcb or xlib does.
(re: cairo-perf-trace at
https://bugs.launchpad.net/ubuntu/+source/transmission/+bug/655024/comments/31)

I initially considered this a text-shadows bug, but am now thinking it may be a
text-shading issue. As an amateur, is there a reason black text "ghosted" to
0.5 alpha "grey" would overwork the tesselator?

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