[dolphin] [Bug 473554] New: gs process with high load during thumbnail creation for specific (faulty?) pdf

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=473554

            Bug ID: 473554
           Summary: gs process with high load during thumbnail creation
                    for specific (faulty?) pdf
    Classification: Applications
           Product: dolphin
           Version: 23.04.3
          Platform: Archlinux
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: johanna_mueller_57 at yahoo.de
                CC: kfm-devel at kde.org
  Target Milestone: ---

SUMMARY
When I open a folder in dolphin with a thumbnail view enabled that contains
this pdf [1], a "gs" process runs that fully consumes on of the cpu cores. It
runs for a while (seconds), and sometimes it seems that when it stops a new one
is started again, so this goes on for a while.
When I encountered this for the first time, I didn't have this folder open at
all, and I had three of them running in parallel, heating up my cpu enough for
me to notice this issue. I don't know if I had previously opened the folder
since the last reboot though (I often go days, sometimes weeks without reboot).
So maybe this can even happen during background-preparation of thumbnails or
something?
The pdf itself opens without problems in Okular and mupdf.

[1]
https://www.weishaupt.de/uploads/tx_weishaupt_documents/documents/83247601_10_16.pdf

STEPS TO REPRODUCE
1. download pdf:
https://www.weishaupt.de/uploads/tx_weishaupt_documents/documents/83247601_10_16.pdf
2. open folder containing the pdf with dolphin with thumbnails enabled

OBSERVED RESULT
gs process with high cpu load spawned/possibly respawned
full command according to "ps aux", edited for privacy:
gs -sDEVICE=png16m -sOutputFile=- -dSAFER -dPARANOIDSAFER -dNOPAUSE
-dFirstPage=1 -dLastPage=1 -q - /home/me/path/83247601_10_16.pdf -c showpage -c
quit

EXPECTED RESULT
no high cpu usage or only for a short time

SOFTWARE/OS VERSIONS
Kernel Version: 6.4.11-arch2-1 (64-bit)
KDE Plasma Version: 5.27.7
KDE Frameworks Version: 5.109.0
Qt Version: 5.15.10

ADDITIONAL INFORMATION

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