Following tests were using Synopse mORMot framework 1.18, compiled with Delphi XE4, against SQLite 3.8.4.3.

We won't show all database engine, but the most representative ones.
Please refer to this other benchmark article for some more complete information.

Insertion speed

'MongoDB ack/no ack' for direct MongoDB access (SynMongoDB.pas) with or without write acknowledge.

For the testings, we used a local MongoDB 2.6 instance in 64 bit mode.

MongoDB bulk insertion has been implemented, which shows an amazing speed increase in Batch mode. Depending on the MongoDB write concern mode, insertion speed can be very high: by default, every write process will be acknowledge by the server, but you can by-pass this request if you set the wcUnacknowledged mode - note that in this case, any error (e.g. an unique field duplicated value) will never be notified, so it should not be used in production, unless you need this feature to quickly populate a database, or consolidate some data as fast as possible.

Read speed

The same records are now read, either one by one, either as a list:

MongoDB appears as a serious competitor to SQL databases, with the potential benefit of horizontal scaling and installation/administration ease - performance is very high, and its document-based storage fits perfectly with mORMot's advanced ORM features like Shared nothing architecture (or sharding).

You can get more information about low-level integration of MongoDB in mORMot, or our integrated ORM/ODM support in the framework.
Feedback is welcome on our forum, as usual!