Apparently it depends on the hardware. And by that I don't mean whether you have a powerful CPU/GPU combination.

If you're lucky, it's smooth as butter. Personally I'm in the unlucky group (i3-6100U + HD 520).

Work is being done to improve the situation: https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1441

Gnome is awesome. Gnome 40 brought some nice performance improvements. Using it on a six years old netbook with 4 GB of RAM and i3.