[Okular-devel] [Bug 218418] New: performance is really bad (on high resolutions)

[Hannes Hauswedell]

https://bugs.kde.org/show_bug.cgi?id=218418

           Summary: performance is really bad (on high resolutions)
           Product: okular
           Version: unspecified
          Platform: FreeBSD Ports
        OS/Version: FreeBSD
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: PDF backend
        AssignedTo: okular-devel at kde.org
        ReportedBy: bugzilla at soulrebel.in-berlin.de


Version:           4.3.4 (using KDE 4.3.4)
OS:                FreeBSD
Installed from:    FreeBSD Ports

Performance is very poor, if working with PDFs that contain images. This has
been the case for quite sometime, but it seems to be especially bad on high
resolution-screens, possibly related to zooming.

I have an AMD Phenom II 4X @ 3ghz and 4 GiB RAM, still with some PDF-Files it
takes seconds for a new page to load clearly. My screen resolution is
2048x1152, Okular is set to aggrissive memory usage. 

I don't know if this is related to poppler, but I know it is faster with Adobe
and with MuPDF.

I have uploaded two screencasts demonstrating the slowness, the first is
general usage / scrolling, the second is about zooming. The second also
contains mupdf running on the same file.

http://soulrebel.in-berlin.de/pub/okular_slow.ogv
http://soulrebel.in-berlin.de/pub/okular_slow2.ogv

Please note that I am not comparing with other software, because I think they
are better (they are not), I am just trying to underline, that this behaviour
is not "normal".

I am not at liberty to make the PDF-File publicly available, but I can send it
to a developer privately if that is needed. I think stuffing 100 JPGs in any
PDF-File will do the trick though.

Thanks for your help!

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