How to treat huge amount of Stadium Crowds Rendering in Unity

Treat to huge amount of Stadium Crowds is pays very high cost in general rendering machines
include Unity Engine.
It seems to be one of solution for treat this issue, “Unity imposter” is the answer I guess.

Is that more efficiently through this any comments will be welcome.
Thank you.

I’m not sure if Imposter supports animations. The description says it works for non-moving GameObjects, but doesn’t mention animations.

You didn’t provide any details about the crowd, your goal, platform you are building for, etc.
How is the crowd created? Are they complex 3D models, fully animated? Is the crowd an unimportant background feature or is it main focus? I can only guess.

Using billboards or models with multiple LODs will probably help in any case.