https://bugs.kde.org/show_bug.cgi?id=448322
Bug ID: 448322
Summary: Major slowdown when running applications as another
user
Product: frameworks-kdesu
Version: unspecified
Platform: Neon Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: general
Assignee: kdelibs-b...@kde.org
Reporter: ddascalescu+...@gmail.com
Target Milestone: ---
SUMMARY
Running the same application as another user with `kdesu` results in that
application reacting much more slowly. This is most easily visible with
LibreOffice Calc scrolling through a spreadsheet.
STEPS TO REPRODUCE
1. Install the latest stable version of LibreOffice by unpacking (as of now)
https://download.documentfoundation.org/libreoffice/stable/7.1.8/deb/x86_64/LibreOffice_7.1.8_Linux_x86-64_deb.tar.gz
and executing `sudo dpkg -i *` in the DEBS directory.
2. Create another user, say `b`.
3. Locate a relatively complex spreadsheet, but even the simple 5000-row file
from
https://file-examples.com/index.php/sample-documents-download/sample-ods-download/
will do.
4. Open the spreadsheet in LibreOffice:
/usr/local/bin/libreoffice7.1 --calc --view file_example_ODS_5000.ods
5. Notice that navigation is fast.
6. Open the same spreadsheet with the same LibreOffice executable, but as the
other user (b):
/usr/lib/x86_64-linux-gnu/libexec/kf5/kdesu -u b -c
"/usr/local/bin/libreoffice7.1 --calc --view file_example_ODS_5000.ods"
7. Notice navigation is much slower, especially when scrolling down.
The `kdesu` command line is exactly what the "Run as user" option of editing
.desktop shortcuts executes.
To keep things simpler if you want to open the spreadsheet side-by-side with
the user you're logged in as, vs. `b`, I used the `--view` parameter to open
the file in read-only mode.
SOFTWARE/OS VERSIONS
KDE neon 5.23
KDE Plasma Version: 5.23.3
KDE Frameworks Version: 5.89.0
Qt Version: 5.15.3
Kernel Version: 5.4.0-91-generic (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-8665U CPU @ 1.90GHz
Memory: 15.3 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620
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