Reply To: Considering the performance when exporting the animations to a game engine like Unity. What will mainly affect the efficiency?

I don’t know that much about Unity I’m afraid.  

But if I was to hazard a guess, I would say all of the things you have mentioned have an affect.

-the more data there is (animation curves)

-the more bones

-the more vertices (and if they are deforming)

-higher frame rate

That all equals more things to compute.

But maybe the Unity instructor @jgonzalez knows more about that.