Version: (using KDE 4.2.4) Installed from: Debian testing/unstable Packages Some documents with big graphics can make Okular browsing very slow if you zoom a lot. One such document is here http://www.ptc.com/appserver/wcms/standards/fileothumbredirect.jsp?&im_dbkey=63973&icg_dbkey=841 This document contains a somewhat big resolution image. Zoom to maximum, search for something ("tolerance" for example) and notice how dragging gets slow. I make this only a wish, because these are extreme cases, but it would be nice to have Okular fast in any situation someday.
Hi ! This bug report is probably too generic but... I noticed some PDFs generated with AutoCad made Okular extremely unresponsive **even though they are displayed quickly with evince with the same libpoppler**. For instance, under Evince, they take 1.5 second to first display ; in Okular, it's closer to 10-15 seconds. It gets worse when zooming and scrolling -- it takes more time and some parts flicker, etc. Please let me know if you are interested in looking at such a file. They contain private stuff, I cannot share them here unfortunately. (configuration : KDE Neon ; Kubuntu 18.04 ; Ubuntu 18.04 ; KDE Apps 18.04)
My mistake : the files I referred to were generated with ARCHICAD (and PDFTron) ; not AUTOCAD.
Hi Mahendra, yours seems to be a separate bug: notice how the original bug report is about slowdown *when searching*. Please file a separate bug report for your problem, and if at all possible try to construct a test file that you can share.
@Oliver : thanks for your quick reply ! Hmm, the problem is I cannot produce such a file, it was made by an architect... Could I share it only with the Okular developers maybe ? Second problem is my bugreport description would be quite generic. It basically takes way too much time to render :) Thanks again !
You may find individuals who are motivated and skilled enough to look at your file, and send it to them in private. But really, please first open a new bug report.
Can confirm it with the PDF I sent Albert at #418086. Zooming in while a page with a huge image renders makes Okular 1.9.2 totally unresponsive for me.
That means, the UI becomes unresponsive, while in the background the rendering seem to continue as the CPU load stays at 25% (1 of 4 cores). Additionally Okular throws "Bogus memory allocation size" in the terminal while filling up all 16 GB of RAM. EDIT: When I tried to reproduce it a second time, everything seem to work as expected. Weird. I will report back if I can reproduce it more reliably.
Regarding the document I originally indicated when posting the bug: it now works very well. However, this computer is probably 5 times faster even on single thread and I don't have a slower one around.