Short description of error
Hairs are recalculated, even it is hidden. So it has poor performance during playback.
Exact steps for others to reproduce the error
- Play animation (I get around 15FPS)
- Remove animation from EFFECTOR or delete effector - I am using it for grass move
- Performance is back
It is strange, bacause hairs are hidden, but something happen on the background, even they are not visible. Maybe it is limitation of Blender.