Just to be clear on the topic, since this is an easily misunderstood aspect of Realm: we are not an ORM. We’re not built on SQLite, we’re not mapping to a relational layer, nor are we serializing objects from a third-party data representation: your objects in the language are exactly the same data that’s stored on disk.

We heard a lot of dissatisfaction from the community as far as Core Data is concerned (including from Apple engineers themselves). I’m also not entirely sure you could ever get Core Data performance to the levels we enjoy, since Core Data cannot be any faster than the SQLite underneath, after all. I do want to say that your feedback on how we present ourselves and the work ahead of us is spot on and much appreciated. Many thanks for speaking up, we will work hard to heed your comments & improve.