When your application needs several pieces of data at once, the fastest approach is to read them from a single location in a single call. In a document database, developers can decide what is stored together, both logically and physically.
Fragmentation has never been beneficial for performance. In databases, the proximity of data — on disk, in memory or across the network — is crucial for scalability. Keeping related data together allows a single operation to fetch everything needed, reducing disk I/O, memory cache misses and network…
