why does the picture in the about dialog take so long to load

Asked by Formerly Kevin Yin, now disabled

Help->About Inkscape
It loads in horizontal chunks, starting from the middle. This is certainly unusual behavior.

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Best su_v (suv-lp) said :
#1

The old renderer in current stable versions is known to have rather poor performance with filter effects. This has improved a lot with the new cairo-based renderer and other refactoring and enhancements (caching, OpenMP support for all filter effects, not only blurs) in current trunk:
<http://wiki.inkscape.org/wiki/index.php/Release_notes/0.49#Rendering_and_performance>

You can test (unstable) development snapshot builds on Windows, if interested, and try whether it makes a difference on your system):
<http://sdrv.ms/Q2Ls0i>

Notes:
- the 'About' screen is not pulled from the internet, it's an SVG file locally installed with Inkscape. You can find it in the program folder, as 'share\screens\about.svg' (I can't verify the exact location on Windows myself, sorry).
- with current stable versions (0.48.2, 0.48.3.1), only Gaussian blurs (also SVG filter effects) can make use of multiple cores for rendering (if supported by the hardware): you can adjust the max. number of parallel threads in 'Inkscape Preferences > Filters', at the bottom.

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Formerly Kevin Yin, now disabled (kyin) said :
#2

Thanks ~suv, that solved my question.