How to achieve best fps for Animating - Built-in Unity animation or coded through Javascript?

Hi I just wanted to know which is the most efficient way (for better fps) for an animation to be performed on the iPhone. Is it via the built-in Unity animation window, via Javascript or otherwise? Any other helpful fps saving tips would also be helpful! Thanks.

I believe something similar was asked yesterday and got a decent response. Rune also pointed to a test he did a while ago here.