I know this is an old topic, but I have a relevant question that doesn't warrant creating a separate topic.
I have a button that I need to animate - it needs to continuously pulsate a bit. Now, my first thought was to just use tween scale to animate it. But since the animation doesn't need to be programmatically altered, I'm thinking of using plain old unity animations on the buttons to scale them, because I think animation will perform better than tweens, especially on mobile. Is this true? How big is the difference in performance between NGUI Tween Scale and unity animation?