[peterhunt]

1. We buffer calls to setState() and apply them all at once (they don't trigger re-renders) and mark those components as dirty. Then we sort by the depth in the hierarchy and reconcile them. Reconciling removes the dirty bit, so if we come across a node not marked as dirty we don't reconcile (since it was reconciled by one of its parents).

2. I don't think we spend a lot of time trying to make this super optimal, but git grep ReactMultiChild to see what we do.

[auggierose]

Thanks a lot! I grepped it but I cannot really figure out the strategy from the source code. Probably you are doing something similar to what I am doing.