Change notification? about hyperbee

[mafintosh]

atm you'll have to use the diff stream for that. we should def add a helper for that.

[mafintosh]

Diff is very efficient on large updates. Having a watch method that tells if you a prefix has changed makes sense as well

[davetapley]

hypertrie also offers this as db.watch(..).

It uses feed.on('append',...), then checks seq to see if it needs to emit an event.
@mafintosh I'm not familiar with diff stream, is there a reason to prefer that approach to the hypertrie one? 🤔

[LuKks]

db.watch([range]) added: #81