Currently when some parent Node gets the parentEffectiveOrientation change notification and its orientation is INHERIT, it invalidates its calculated orientation values (effective and automatic) and automatically forwards this notification to all its children. These notifications could flood the Scenegraph when it is constructed from bottom to up. In this case it is probably better to get the parent's effective orientation directly, calculate new Node's effective and automatic orientations, compare them with old values and forward to children only when real change is detected (not a mere invalidation).