[Koko] [Bug 495431] New: Caching Issue

[Aleksandra Lisya]

https://bugs.kde.org/show_bug.cgi?id=495431

            Bug ID: 495431
           Summary: Caching Issue
    Classification: Applications
           Product: Koko
           Version: 24.08.2
          Platform: Flatpak
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: General
          Assignee: unassigned-bugs at kde.org
          Reporter: dusty_08rowing at icloud.com
                CC: nate at kde.org
  Target Milestone: ---

SUMMARY
Koko have some caching issue, i explain, there is a folder i open quite often,
so tumbnail are generated, yet every time i open it it take an insane amount of
time (compared to dolphin to do the same) for loading all the thumbnail.

Also when we scroll this "loading" start again, making Koko very frustrating to
use.

Once scrolled to the end the worse if we go back where thumbnail were already
load ... they load again !!

I tried it both with full drive access permission set, and once with restricted
permission to see if the flatpak could have forgotten to give permission to
reach the "cache or thumbnail folder" it's not have changed anything.

STEPS TO REPRODUCE
1. Leave picture folder to another
2. increase thumbnail size (and wait all tumbnail to be created)
3. Close koko and restart it.
4. Go in the same folder and see.
5. Optionally scroll to see it worse.

OBSERVED RESULT
Long loading time of thumbnail like it was generating them one to one.
scrolling make it load like the app never opened the folder before making it
absolutly nightmarish to use.

EXPECTED RESULT
Load very fast after the inital thumbnail creation and continue to be loaded
once scrolled up or down

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.2.2
KDE Plasma Version: 6.2.2
KDE Frameworks Version: 6.7.0 
Qt Version: 6.7.2

ADDITIONAL INFORMATION

Use Wayland and the Kernel 6.11.4 on Fedora 40

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