i can also report very slow window movement.
i'm using 3 eizo ev2455 in this order: 1920x1200,1200x1920,1920x1200
the right most ist connected to a kensington usb3.0 2x video dock.
if i move a window on the display link screen windowserver goes to >95% cpu and displaylinkmanager to >65%.
this is on a end 2014 corei7 mac mini with 16gb memory and macOS 10.12 gm.
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