Fabian also added some comments just after:
[12:06] <fvogt> * Did some strace-based profiling of plasma startup -
discovered two things:
[12:06] <fvogt> ** The applicationDir is added as first entry to the
QML and Library search paths, slowing lookups down considerably
[12:06] <fvogt> especially for libraries, as it literally opened every
file in /usr/bin/ to check whether it's a plugin...
[12:07] <fvogt> Easy workaround available, but should probably be
fixed in Qt
[12:08] <fvogt> ** KPluginLoader::forEachPlugin takes significantly
more time if all plugins are in a single directory, so there should
probably be a policy to put them into subdirs
[12:09] <fvogt> ** Plasma wayland session is now tested by openQA in
the usual Tumbleweed release process - so if you break stuff it delays our
releases, so please don't do that :P
[12:09] <fvogt> EOF