Clojurians Log v2

to elaborate about the dom3 diff interpreting. The bug it fixed was: in certain circumstances, we would remove and immediately reinsert the same dom element, and because it was synchronous we considered that to be a noop. But in fact it caused browser layout to recompute. This caused layout jank in certain very heavy/complex demos using virtual scroll. It was also likely responsible for a subtle virtual scroll bug reported last month, where the scroll handle, as you drag it down with a mouse, would jitter a bit.