Constant error messages "AT-SPI: Could not obtain desktop path or name" cause poor performance
I just noticed today with mutter master the gnome-shell login animation stutters badly, as does dragging windows.
Bisected (I don't understand why, but this is indeed the problem):
bd624e4dfb4de728b5cd8ed9e5fd2d6d6104b84f is the first bad commit commit bd624e4dfb4de728b5cd8ed9e5fd2d6d6104b84f Author: Jonas Ådahl <firstname.lastname@example.org> Date: Mon Nov 12 11:29:44 2018 +0100 tests: Override X11 display number As with the Wayland display name, to avoid clashes with already an running Xwayland or Xorg instance, override the X11 display name to something less likely to cause a clash. https://gitlab.gnome.org/GNOME/mutter/issues/193 :040000 040000 7fcbd06cf416269645cc96a98036bf2d6aff17f3 1eecb43a92f7ee0bed5d35067008eb6a61dc5f35 M src
Performance results on an i7-7700: