[dolphin] [Bug 436505] New: Opening large file through dolphin causes large increase in dolphin memory use

[Paul]

https://bugs.kde.org/show_bug.cgi?id=436505

            Bug ID: 436505
           Summary: Opening large file through dolphin causes large
                    increase in dolphin memory use
           Product: dolphin
           Version: 21.04.0
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: hollense at cs.dal.ca
                CC: kfm-devel at kde.org
  Target Milestone: ---

STEPS TO REPRODUCE
1. Open dolphin, memory use ~25MB
2. Click to open a large (e.g. 1GB) file in another program

OBSERVED RESULT
Dolphin memory usage jumps to >500MB.

EXPECTED RESULT
Memory use is not significantly affected by clicking to open a file in another
program.

COMMENTS
I have observed this behavior also in Dolphin 20.12, and across multiple file
types, such as an archive opened in Ark, and a video.  The detective work was
done by another in bug 398908, and also reproduced by a third user.  In all
cases, memory use did not increase if the file was opened via right click and
selecting "Open with <program>" in the menu. I am creating this report because
398908 is a reopened bug from 3 years ago for a presumably unrelated issue.

KDE Plasma Version: 5.21.4
KDE Frameworks Version: 5.81.0
Qt Version: 5.15.2

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