Using UUIDs instead of ObjectIDs in MongoDB

Question

We are migrating a database from MySQL to MongoDB for performance reasons and considering what to use for IDs of the MongoDB documents. We are debating between using ObjectIDs,

Answer 1

I found these Benchmarks sometime ago when I had the same question. They basically show that using a Guid instead of ObjectId causes Index Performance drop.

I would anyways recommend that you customize the Benchmarks to imitate your specific real life scenario and see how the numbers look like, one cannot rely 100% on generic Benchmarks.