If I had to guess from looking at his git repo, he&#x27;s referring to LMDB::<p><a href="http:&#x2F;&#x2F;symas.com&#x2F;mdb&#x2F;" rel="nofollow">http:&#x2F;&#x2F;symas.com&#x2F;mdb&#x2F;</a><p>sqlite and lmdb aren&#x27;t exactly equivalent, but I guess that is his point; you can gain a lot of performance just by understanding your use case and what tradeoffs you can make.