Hi, which one is more performance effective, the coding movement in the Update() or using an animation?

I think that would be highly dependent on the type of rotations/movement you're doing. If you're doing a simple rotation like a propeller it might be better to do it through code, but if you're rotating a ton of objects in weird ways it might be easier and more performant to do it through animations. 

I usually try to do it through script unless the movement is a bit too complex and tedious to write out.