How do I optimize my Firebase realtime database?

Explanation: Both A and B is best practices for firebase. 9. limitToFirst method returns the specified number of items beginning from the first one. Explanation: True, limitToFirst method returns the specified number of items beginning from the first one.

There are a few different ways to improve Firebase Realtime Database performance in your app.

Firebase and MongoDB are both designed to perform well at scale, but given MongoDB’s configurability and the range of Atlas performance tiers, it’s hard not to say that MongoDB comes out on top when it comes to pure performance .