[vjeux]

At a first glance, this seems like Angular's digest loop. Can someone make a more elaborate comparison for people that know nothing about iOS?

[seivan]

It's basically observing properties on NSObject subclassed classes. It doesn't work properly with UIKit, but most other stuff it works 'fine'. According to some smarter people than myself, the internals of KVO is a giant mess. But that's beyond me.