high cpu ussage in opencpn when aouto pilot is using route

[ddelorme]

i am experiencing very high cpu usage over 90% when auto pilot is following a route in opencpn.. I believe i have some settings wrong and possibly back feeding nmea data . I am at work for a few more weeks before I am on the boat again. Could some one please tell me what i should set for kplex and opencpn. Or screen shots. All software is current and updated. i am using a openplotter v1.2.0 on a rpi3+ with a pypilot motor controller and a marine-pilot 1500 with just the actuator. This winter i would like to change the actuator to something faster as it is too slow to react properly in high wind gusts when close-hauled. To be fair i had too much sail up 150 Genoa and main with 1 reef 14knts gust close to 20knts. recommendations welcome..
my boat is a Tanzer 26 with updated rudder.