https://bugs.kde.org/show_bug.cgi?id=457605
Bug ID: 457605
Summary: On large collections digikam often freezes for seconds
with 100% CPU while paging through images
Product: digikam
Version: 7.1.0
Platform: Debian stable
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
On large collections digikam often freezes for seconds with 100% CPU while
paging through images
STEPS TO REPRODUCE
1. Set up digikam to use a really large collection of photos (I've got 118029)
2. Work in digikam, moving often from photo to photo (doesn't depend on whether
this is in Image Editor, or just scrolling through an album view. Doesn't need
to be new photos, just switching between 2 photos in ImageEditor is enough to
trigger this)
OBSERVED RESULT
Eventually, digikam hangs for a couple of seconds, with 100% CPU (as shown by
top). When this happens in ImageEditor, a "Loading" progress bar is shown at
bottom left of window, often stuck at 0%, but occasionally also at another
percentage such as 73%. Doesn't happen on every new image, but only once in a
while.
EXPECTED RESULT
Displaying a new image should always be snappy
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: Debian 11
(available in About System)
KDE Plasma Version: 5.20.5-1
KDE Frameworks Version: 5.78.0-2
Qt Version: 5.15.2
ADDITIONAL INFORMATION
This happens on a box with a fast NVME SSD disk.
Only happens on large collections. Indeed, after I included just the albums
from my recent trip (1923 photos), everything seems fine.
However, with the larger collection, neither disabling plugins of category
"Export", nor unchecking "Monitor the albums for external changes" helps.
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