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How is memory measured when dealing with animation keys?

When looking at textures UE4 tells you a 1K texture is going to be consuming X amount of VRAM but how do you measure how much VRAM or RAM? Is consumed by amount of animation keys in a single FBX imported file?

1 - Lets say I have 1000 Keys on an animated character after compression. How do I know how much memory the keys are consuming? I want to be able to know if I import fifty more animation files for the same character which all include 1000 keys how much memory is being consumed.

2 - Also do animation keys consume VRAM or RAM?

Thanks.