@pvital the engine is a classic pub/sub system. There is a timer on the main thread that creates new events to publish, but there are no default listeners on that event. The timer runs every 10s by default IIRC.
but cpu consumption should be near 0 between events
if no network traffic occurs, that is.
Have you checked to see if the cpu consumption happens on a hello-world sample app? or only when your app is mounted?