https://bugs.kde.org/show_bug.cgi?id=463197
Bug ID: 463197
Summary: UI frequently locks up / unresponsive with large
collection
Classification: Applications
Product: digikam
Version: 8.0.0
Platform: Microsoft Windows
OS: Microsoft Windows
Status: REPORTED
Severity: normal
Priority: NOR
Component: Albums-IconView
Assignee: digikam-bugs-n...@kde.org
Reporter: metal...@gmail.com
Target Milestone: ---
SUMMARY
I'm a new digiKam user, migrating over from Lightroom. Upon importing my full
collection (~250k photos & videos; majority are jpegs), I immediately notice
that the application seems to "lock up" very frequently. This is something I
never experienced previously with Lightroom. The severity of these UI lockups
seem to correspond directly to the number of images involved; it's as if the
software is doing O(n) operations on the photos directly in the UI thread. It's
consistently reproducible, i.e.:
STEPS TO REPRODUCE, 1
1. Add a large collection (~250k items), wait for it to complete
2. Press Control+F to initiate a search
3. UI locks up & becomes unresponsive for nearly 60 seconds.
Here's a video showing this behavior:
https://jiij.cc/snaps/2022-12-18_08.33.03.mp4 . This seems to make "search"
nearly unusable.
STEPS TO REPRODUCE, 2
1. Add a large collection (~250k items), wait for it to complete
2. View->Include Album Sub-Tree=On
3. Highlight the top-level album
4. UI locks up & becomes unresponsive for nearly 60 seconds. Here's a video
showing this behavior: https://jiij.cc/snaps/2022-12-18_08.45.30.mp4
5. Any other operations - i.e. changing the sort order, etc - will again lockup
the UI.
OBSERVED RESULT
DigiKam constantly locks up & becomes unusable.
EXPECTED RESULT
Long operations to be performed on a background thread, so that the UI can
remain responsive irrespective of the number of items being shown. With the
same collection of items, I never observed such lockup in LR - UI operation was
always smooth.
SOFTWARE/OS VERSIONS
Windows: 7
ADDITIONAL INFORMATION
Reproduced on both 7.9.0 and 8.0.0-beta1
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