Animating Sharing Plugin main goal is to sync one animation state between characters, even for several animations. However, if my char has only 1 animation, will I gain performance ms when using this plugin instead of just setting skeletal mesh anim mode to use my only one animation?
You need to bench test.
But yes, theorerically the animation sharing should result in less of a cost.
It sort of does the same thing as just putting a skeletal mesh with a single animation into the scene, but it should be doing more than that since it is meant to ease the runtime cost of many skeletal meshes running the same animation.
Either way, dont use the character BP.
Make a qhick pawn with the skeletal mesh, the sharing component and assign a clean 1 animation abp.
Litter the scene with around 100 pawns which is probably the maximum you can realistically do if using unoptimized humanoids and test it with the animation sharing On vs Off to see if you have some discenrable cost reduction…