Performance > rendering

I've noticed on the examples such as [listView](https://github.com/Flipboard/react-canvas/tree/master/examples/listview) that items are rendered on each scroll event. This works for simple and flat DOM structure but as soon as an item becomes deep and complex, rendering on scroll becomes a bottleneck (renders take more than 16 ms).

Even if I cache the items in ListView instead of calling the getter, the render methods on the children are still called. It seems to be due to this [line](https://github.com/Flipboard/react-canvas/blob/master/lib/Group.js#L24). Do you have any suggestions to avoid rendering so frequently?