Comment 4 for bug 1587635

I also see this memory leak with the nvidia driver v346 and the nouveau driver as well, so no difference here for me.
What we need is a backport of these two patches mentioned in this KDE bug report:

https://bugs.kde.org/show_bug.cgi?id=344879#c122

otherwise plasmashell will continue to eat more and more memory with every plasma screen update, like opening a plasmoid, systray item menu, etc.

I tried Fedora 24, which is build against QT 5.6 and it does not suffer from this problem.