Useless call of xdg-mime that is not working properly and slow down startup

[avi9526]

• Operating System (Linux/Mac/Windows/iOS/Android): Linux
• Delta Chat Version: deltachat-desktop 1.46.8-1
• Expected behavior: Fast startup
• Actual behavior: Slow startup with freezing desktop (Plasma) for 1..2 seconds
• Steps to reproduce the problem: Install Arch Linux, update it, install Plasma desktop, install DeltaChat, launch it and login, close, launch it as:

strace -c electron30 /usr/lib/deltachat-desktop/app.asar

close DeltaChat from tray icon after main window appears

strace report include:

% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ------------------
 90.08    0.388022       29847        13         1 wait4
  2.64    0.011358           7      1577           ppoll
  …

became root and do:

cd /bin/
mv xdg-mime /root/
cp -r echo xdg-mime

repeat strace run from above, output is:

% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ------------------
 38.23    0.021738        1672        13         1 wait4
 16.67    0.009478           5      1591           ppoll
 …

Changes in launch time is visually noticeable - it opens almost instantly

• Screenshots:
  null
• Logs:
  strace logs include

04:19:54 wait4(33498, xdg-mime: application argument missing
Try 'xdg-mime --help' for more information.
[{WIFEXITED(s) && WEXITSTATUS(s) == 4}], 0, NULL) = 33498 <0.273471>

It seems xdg-mime is not doing anything useful and quits with an error.

Fast workaround is:
/usr/bin/bash -c 'function xdg-mime { echo ; }; export -f xdg-mime; /usr/bin/deltachat-desktop --minimized'