https://bugs.kde.org/show_bug.cgi?id=324917 Bug ID: 324917
Summary: digikam-3.4: loading of tag icons fails → very high
CPU usage and freezing GUI [callgrind]
Classification: Unclassified
Product: digikam
Version: 3.4.0
Platform: Gentoo Packages
OS: Linux
Status: UNCONFIRMED
Severity: grave
Priority: NOR
Component: Tags
Assignee:
[hidden email]
Reporter:
[hidden email]
Hello
I upgraded from 3.2 to 3.4 today. When I opened digikam afterwards, the GUI was
extremely sluggish, moving the mouse over anything took very long and CPU load
was always 100% on one core.
I managed to narrow it down to the tags tree. If it is not visible, then
browsing works fast as usual, albeit still generally a bit slow-ish. If I open
the tag filter sidebar, then digikam hangs for a while and then returns to
normal. It will also hang if I move the mouse over the tag tree. If I open the
tag editing sidebar, then browsing images becomes very slow, too, because the
tree needs to be updated for every image.
Also, instead of the usual icons, I have question mark icons in front of all
tags.
So it seems something is very wrong with loading tag information. For
profiling, I loaded digikam into valgrind and opened the tag filter sidebar. I
waited for it to open and settle down in terms of CPU load. Then I enabled
callgrind through SSH (so I don't have to switch programs which would fudge the
measurement) and only moved the mose a bit over the tag tree. Once the CPU load
had settled again, I switched callgrind off. See attached KCacheGrind’s output
for the measurement.
It seems that loading icons for the tags is the problem...
99.7% of the time that the CPU spends heating my room is in
KIconLoader::loadIcon.
The database used has 199 tags, 13002 images and 16696 imagetags.
I rebuild digikam with debug symbols enabled. So if you want me to debug more
specifically, please let me know.
Reproducible: Always
--
You are receiving this mail because:
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel
Locked
