[dolphin] [Bug 450393] New: Deleting around 4000 files from a folder takes forever

[Barade]

https://bugs.kde.org/show_bug.cgi?id=450393

            Bug ID: 450393
           Summary: Deleting around 4000 files from a folder takes forever
           Product: dolphin
           Version: 19.12.3
          Platform: Ubuntu Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: barade.barade at web.de
                CC: kfm-devel at kde.org
  Target Milestone: ---

If I select and delet around 4000 files from a single folder I have to wait
several minutes until all files are deleted.
For every file the counter of deleted files is increased by one. Maybe delete
multiple files and then update the counter of the counter slows it down. Using
a command like "rm *" is executed immediately. Maybe it is moving them to the
trash which slows it down. Anyway, it needs to be MUCH faster.


STEPS TO REPRODUCE
1. Create a folder with around 4000 files (I had small JSON files)
2. Select them all and press delete.
3. Wait several minutes until all files are in the trash.

OBSERVED RESULT
It takes several minutes.

EXPECTED RESULT
It should take only a few seconds.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: KDE Frameworks 5.68.0
Qt Version: Qt 5.12.8 (built against 5.12.8)

ADDITIONAL INFORMATION

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