Lazy loading is an efficiency pattern called lazy loading it means you can load a lot of objects and not have to go through all the time of loading all the related things all over the end do lazy loading just every or my ever seen. It's also at the core of this somewhat controversial concept in orance called the the n plus one problem right that's probably the most common performance problem people run into with n plus one queries. The other cool thing it had was to think you're loading which means that when we write a query we say hey mr object database thing we don't know anything about we want users and then later I want addresses if I have to say hey I want you