[taion]

Are you doing anything clever to figure out e.g. which subset of changefeeds subscribed to a table might be interested in a given update?

Let's say I have a table containing data for many users, while each subscription only needs data for a single user. Instead of scanning through all the changefeeds, you could put subscriptions in a hashmap and figure out which ones to update in O(1) time rather than O(N) time in number ob subscriptions, per update.

Obviously this is much harder in the general case, but do you do anything along these lines?