Yes this is a good point too. It makes sense that there might be some delay added when the OS has to start the app in the background to respond to an event the

Yes this is a good point too. It makes sense that there might be some delay added when the OS has to start the app in the background to respond to an event the app has registered for (...didRangeBeacons...) and maybe one of the reasons they recommend against killing the app!