Bug 198151

Summary: Okular/PDF does display large PDF files very slowly
Product: [Applications] okular Reporter: Martin Bretschneider <bugs>
Component: PDF backendAssignee: Okular developers <okular-devel>
Status: RESOLVED UPSTREAM    
Severity: normal CC: psychonaut
Priority: NOR    
Version: unspecified   
Target Milestone: ---   
Platform: Debian testing   
OS: Linux   
Latest Commit: Version Fixed In:
Attachments: Public transport map

Description Martin Bretschneider 2009-06-28 12:41:07 UTC 
Version:            (using KDE 4.2.2)
OS:                Linux
Installed from:    Debian testing/unstable Packages

Hi,

Okular displays large or complex PDF files quite slow on my computer (AMD64 X2 4200+, 2 GB RAM, Geforce 6600 GT with nvidia drivers). For a complex file see the file "uestra.de_Hannover_2009.pdf" that is a map of public transport that seems to have a lot of vector data. Okular does display it very slowly. Adobe Reader 9.1 display is faster.

Another example is a PDF file is an advertising with a lot of bitmap data: "mediamarkt.de_prospekt.pdf". Here Adobe Reader 9.1 is slower but even still faster than Okular.

What do you think? Can Okular display is faster? Maybe using another CPU core using multithreading?

TIA  Martin
Comment 1 Martin Bretschneider 2009-06-28 12:42:10 UTC 
Created attachment 34885 [details]
Public transport map
Comment 3 Pino Toscano 2009-06-28 12:57:55 UTC 
Hi,

Okular does not load and render PDF documents by itself, bu uses an external library called Poppler.
If you think rendering time is slow, please report the problem to the Poppler's bug tracking system: https://bugs.freedesktop.org, "poppler" product.
Okular cannot do anything on its side to influence Poppler's rendering speed.
Comment 4 Tristan Miller 2010-03-15 11:41:35 UTC 
Possibly one or more of the following poppler bug reports are relevant:

https://bugs.freedesktop.org/show_bug.cgi?id=26759
https://bugs.freedesktop.org/show_bug.cgi?id=13487
https://bugs.freedesktop.org/show_bug.cgi?id=13518