f163a15b13
We have a quite accurate view of the X stack, so there's no good reason to ask the X server to do restacking that has no effect. (Restackings that have no effect on either X windows or Wayland windows were generally optimized out in the synchronization code, but in other cases like moving an X window that is only beneath Wayland windows to the top of the stack we would make such requests.) Removing such requests: - Is a small efficiency win in itself - Allows us to immediately go ahead and apply Wayland changes to the verified stack - Prevents queued Wayland changes piling up waiting for an X event that will never be received, since the X server will not send confirmation of no-op restacks. Since such operations may still have an effect on the relative stacking of X and Wayland windows, we need to continue applying them to the local stack. https://bugzilla.gnome.org/show_bug.cgi?id=736559