So reading from RAM in a single-threaded key/value store with a lightweight text protocol, is faster than reading from disk in a multi-threaded relational database with SQL parsing and ACID semantics. As measured by a heavy web framework running in a slow interpreted language that overshadows the speed differential so much that it's only 16x at the end.

This article is obvious in its conclusion, inaccurate in measurement, and useless for any discussion.