Evaluating query performance

As you develop and operate applications with RethinkDB, you may need to analyze the performance of the application and its database. Usually, when you encounter degraded performance, it is often due to incorrect database access strategies or poorly-written queries.

RethinkDB provides a tool called a database profiler that shows performance characteristics of queries executed on the database. This tool is accessible from the database web interface. Once enabled, the profiler will present you with a breakdown of all operations performed on the database during the execution of a query, including the time it took to run each operation.

Probably, the most useful piece of information provided by the database profiler is the server time, which represents the total execution time of a query on the database server. This doesn't include the additional overhead caused by the network round trip; however, if you are interested in the total time, including the time it took...