Comment by retsibsi
> Click and click is slower than click+drag, it’s just obviously two extra movements (a full extra press and an extra release).
I don't think this is right, because the second release is irrelevant (a click-click move happens on the second mousedown, not the second mouseup) and the first release can be done in parallel with the mouse movement. So really it is:
mousedown -> drag -> mouseup
vs.
mousedown -> (mouseup while moving) -> mousedown
mouseup has to occur before moving, or it initiates a drag