I have recently bought a 2016 Mirage (CVT) with a cruise control and looking for the most efficient way to drive the car.
I love driving with a cruise control, but I have noticed that when it is used to accelerate by holding the swith into + position, engine revs up to around 3000-4000 RPM until reaching the desired speed. At the same time, if the speed is increased gradualy by a single "press" of the + switch, engine runs at relatively low REVs.

Would you think that is more efficient to accelerate with a cruise control pushing up REVs, or gently using an acceleration pedal?