The author was using redigo (<a href="https:&#x2F;&#x2F;github.com&#x2F;garyburd&#x2F;redigo" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;garyburd&#x2F;redigo</a>), which by my analysis is fairly performant.<p>One of the likely causes for issues is file descriptor limits or TCP tuning that you suffer when stress testing two dependent networking apps on the same server. BoltDB, being embedded, just works out of the box.