High CPU Util; Lag on laptop screen

Uses 25% of CPU per Activity Monitor. Introduces unacceptable lag on laptop screen (maybe due to high CPU util?). Unable to set to default resolution of my iPad2, 1024x768. It scales down a larger resolution, so there are black bars on top/bottom/sides of iPad display (wasted screen space).

Won’t use this unless absolutely necessary.

MacBook Pro, early 2011, OS X 10.10.5
iPad2, iOS 9.0

FordGuy61 about Splashtop Wired XDisplay – Extend & Mirror