An error occurred while saving the commentAmir Stone commented
So sorry you're experiencing responsiveness issues. Can we get a little more details about when you're experiencing this problem? Do you have many (hundreds or thousands) of layers in your composition?
If so we may have a fix for you. Could you try out the latest AE Beta and see if it behaves better for your use cases?
If not, we'd love more details about your setup and use cases in order to diagnose and fix it.