There is a tongue-in-cheek statement attributed to an unknown Twitter user: “If a MongoDB query runs for longer than 0ms, then something is wrong.” This is typical of the kind of buzz that surrounded the product when it first burst onto the scene in 2009.
The reality is that MongoDB is extraordinarily fast. But if you give it the wrong data structures, or you don’t set up collections with the right indexes, MongoDB can slow down dramatically, like any data storage system.
MongoDB also contains advanced features, which require some tuning to get them running with optimal efficiency.
The design of your data schemas can also ...