Fbx animation

Hi which methode is the more optimized:
1- to use one fbx contain all animations(from 1 to 45 walk from 46 to 60 idle …)
2-to put each animation in separate fbx .
thanks for helping

It is my understanding that they are both the same in terms of memory/run-time efficiency, and are simply a preference of how you want to animate your assets.

I personally like having a single mesh with all animations, as I find it easier to maintain, but your preferences might differ.