Hi Pino, On Wednesday, 10. June 2009 16:31:26 Pino Toscano wrote: > Hi Peter, > > > I had a short look on the bug https://bugs.kde.org/show_bug.cgi?id=190600 > > (= "Hovering large PDFs slows down KDE"). When hovering a PDF in e. g. > > Dolphin, a preview of the PDF will be generated by using KDE's thumbnail > > mechanism. > > > > The corresponding thumbnail plugin that seems to have problems with huge > > PDFs is located at kdegraphics/thumbnailers/gscreator.cpp > > That thumbnailer invokes `gs` (ghostscript) to get the image of the first > page of the PS/PDF document (and coverting DVI files to PS, first). Do you > get similar blocks/slowdowns if running `gs somebig.pdf` on command line?
No, when using the commandline everythings seems to be fine... > > > I did not have a > > look how Okular generates the thumbnails for PDF pages, but I was > > wondering whether this code could also be moved to the PDF thumbnailer to > > solve the issue mentioned above... > > Okular uses the Poppler library for PDF documents. Most probably it could > be done an own PDF thumbnailer which just uses Poppler for thumbnails > (should be like 10 lines or so), but would be interesting to know whether > the problem is actually just ghostscript crawling with very big documents, > or the documents themselves are "heavy". > What is missing is also the indication of the actual "slowness", ie if KDE > 4 becomes slow because the CPU is very busy in rendering complex documents > (in which case, even Poppler could give the same problems), or there's too > much I/O job, or RAM usage, etc. I did some further tests in the meantime with several reboots and checked the CPU load. It seems to be related with Nepomuk, which consumes 100 % CPU load for a few seconds on my system. When turning off Nepomuk and Strigi I've no freezes anymore when hovering problematic PDFs... I'll be at the Nepomuk coding sprint next week and hopefully I can discuss this kind of issues there with Sebastian Trüg - sorry for the noise, the issue seems to unrelated to the PDF thumbnailer... Thanks for your fast reply! Peter _______________________________________________ Okular-devel mailing list [email protected] https://mail.kde.org/mailman/listinfo/okular-devel
