https://bugs.kde.org/show_bug.cgi?id=465671

Nicolas Fella <nicolas.fe...@gmx.de> changed:

           What    |Removed                     |Added
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                 CC|                            |nicolas.fe...@gmx.de

--- Comment #1 from Nicolas Fella <nicolas.fe...@gmx.de> ---
The problem is this:

app.set_as_last_used_for_type(mimeType) touches .config/mimeapps.list. It
doesn't actually change anything, but it updated the lastmodified timestamp.

When an app is started KWin uses KService to check for the
X-KDE-Wayland-Interfaces in the app's desktop file. KService notices that
mimeapps.list was touched since the last time it used it and rebuilds its
cache. That takes about a second and causes the freeze

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