[Poppler-bugs] [Bug 14590] Clipping to the document size slows down rendering significantly

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=14590





--- Comment #3 from Jeff Muizelaar <jeff at infidigm.net>  2008-02-21 14:56:14 PST ---
(In reply to comment #0)
> Attached are two copies of the same cairo generated PDF document.
> 
> The first one (fast.pdf) takes about 14 seconds to render on my machine (in
> evince  2.20.2 using poppler 0.6.2) and the second takes 28 seconds.
> 
> The only difference is that second one has a clipping path set that matches the
> document borders (this doesn't seem to make any difference to what PDF viewers
> display but does affect what SVG viewers display if I render to the SVG backend
> which is why I'm doing it).
> 
> With larger documents the slowdown seems to get larger - I've seen a jump from
> 30 seconds to 105 seconds with a larger document.
> 

I'm guessing that if you use the git version of libpixman (used by cairo) the
performance of the clipped document will improve considerably.


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