[ ] pad in the direction currently scrolling. We currently just pad on the bottom, but it should be easy to pad in the direction we are going, this should improve user experience when scrolling up
[ ] multi-height in some situations it seems like multi-heights calculations for "needed views" in DOM is slightly off. Resulting in flicker. This seems to only happen when transitioning from a small number of active views to a large number.
[ ] experiment with multiple pools. Pool per height + view base class.