[poppler] pdf rendering performance on the olpc test boards

[Carlos Garcia Campos]

El mar, 07-11-2006 a las 18:11 +0100, Tomeu Vizoso escribió:
> Hi,
> 
> we have been testing the olpc pdf reader on an test board (based on
> evince and poppler) and have found the performance a little below our
> expectations. Simple text pages (for example [1]) take about 4 seconds
> to render.
> 
> After some profiling of page rendering on the board with sysprof, this
> functions appeared using 45% of CPU time:
> 
> _XcmsLookupColorName
> _XcmsSetGetColors
> _XcmsInitScrnInfo
> _XcmsResolveColorString
> 
> We are currently using the 0.5.4 version with the cairo backend. The
> processor on the board is a Geode GX-500 [2], the floating point
> performance of which is quite poor. Composition is currently done by
> software.
> 
> Does this info make some sense to anybody? Is poppler who is eating our
> CPU or should we look elsewhere? Can you recommend any compilation
> options that could improve performance?

Probably using splash instead of cairo will help. Have you tried it
already?

> I can send the sysprof file, if anyone is interested in giving a look.
> 
> Thank you very much,
> 
> Tomeu
> 
> [1] https://ols2006.108.redhat.com/reprints/jones-reprint.pdf
> [2] http://wiki.laptop.org/go/Hardware_specification
> 
> 
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> poppler at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/poppler

-- 
Carlos Garcia Campos (KaL)
   elkalmail at yahoo.es
   carlosgc at gnome.org
   http://carlosgc.linups.org
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