[dolphin] [Bug 415065] New: Dolphin 19.08.3 lags with a large amount of tags

[Louis]

https://bugs.kde.org/show_bug.cgi?id=415065

            Bug ID: 415065
           Summary: Dolphin 19.08.3 lags with a large amount of tags
           Product: dolphin
           Version: 19.08.3
          Platform: Kubuntu Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: panels: places
          Assignee: dolphin-bugs-null at kde.org
          Reporter: louis621 at protonmail.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

Created attachment 124437
  --> https://bugs.kde.org/attachment.cgi?id=124437&action=edit
Video demonstrating the issue.

SUMMARY
Dolphin freezes on startup for a second or two if there is a very large amount
of tags, and modifying items in the Places panel, for example, hiding an item,
causes a huge delay and a lot of lag.

STEPS TO REPRODUCE
1. Create a large amount of tags (I tested with 350 tags)
2. Open (or restart) Dolphin
3. Hide an item in the Places panel

OBSERVED RESULT
Dolphin hangs for a second or two as it reads and parses the user-places.xbel
file, and modifying Places causes it to lag, and it takes seconds until the
change is completed. The problem seems to get worse every object you modify in
Places.

EXPECTED RESULT
Dolphin does not freeze on startup and modifying the Places panel is responsive
and instant.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Linux 5.3.0-24, Kubuntu 19.10 with Backports PPA
KDE Plasma Version: Plasma 5.17.4
KDE Frameworks Version: 5.64.0
Qt Version: 5.12.4

ADDITIONAL INFORMATION
This issue seems to depend on the speed of the machine running Dolphin. A
slower computer might be worse off, and a faster computer might not have this
issue.

-- 
You are receiving this mail because:
You are on the CC list for the bug.