[beders]

Building 'signal graphs' because views subscribe to err signals is an old hat for re-frame users who are benefiting from a clean and simple mechanism to react to data changes since forever.

Subscriptions grow from the leaf up to the root (which is a single app "db") and so computation is minimal. If something writes to the "db", only relevant subscriptions are recomputed and only views subscribing to those are "repainted".

Works like magic.