The slowness was very apparent for me too. I used to keep restarting the shell (Alt F2, then r) to get it back to normal speeds(this doesn't close the running applications).
In Wayland, they removed this shortcut. I've since switched to KDE.
In Wayland, they removed this shortcut. I've since switched to KDE.
I'm usually not one to come to Gnome's defence, but it's very likely they did not really have any choice there. In Wayland, the compositor is the parent process of the entire session, so you cannot restart it willy-nilly. That's a design choice made by the Wayland protocol, not by the Gnome devs.
So I guess Qt's implementation is of better quality.