[olau]

Then you've surely hit the memory reclaim problem. I checked just now and my GNOME Shell started this morning is using 153 MB memory (resident).

There are some latency issues after moving to Wayland, though. Don't have a good link, but AFAIK it has something to do with Mutter or the Shell which were never specifically optimized for latency ending up being responsible for input handling.

[NoGravitas]

It's not just Gnome Shell. I mean, I do hit the memory reclaim issue, but Gnome Shell is still not using that whole extra 1GB. The rest is evolution-data-server and so on.