The delay seems to be caused by the overlay-scrollbar module. Deactivating these scrollbars restores the normal launch behavior.
Simple test case:
$ killall -9 xfce4-appfinder $ LIBOVERLAY_SCROLLBAR=0 xfce4-appfinder
The delay seems to be caused by the overlay-scrollbar module. Deactivating these scrollbars restores the normal launch behavior.
Simple test case:
$ killall -9 xfce4-appfinder SCROLLBAR= 0 xfce4-appfinder
$ LIBOVERLAY_