(DOTS Physics) 10000 cubes causing a frame rate drop

I have a test scene where 10000 cubes fall on each other using Dots and Havok Physics, It has a frame rate drop when they all fall and collide with each other. but when they are "still" the frames don't go back up When they get to the bottom they all just kind of jitter around very small amounts. I am trying to get them to stop so I can have some frames back when they are resting. I've tried increasing the friction but that doesn't work. Is there anyway to fix this? Like tell them to freeze if their velocity is low enough? Thanks for the help.