&gt; Why so hostile? Personally, I assume this is just an instance of them not being PostgeSQL experts.<p>Postgres&#x27; official documentation on json and jsonb is rather concise: <a href="http:&#x2F;&#x2F;www.postgresql.org&#x2F;docs&#x2F;9.4&#x2F;static&#x2F;datatype-json.html" rel="nofollow">http:&#x2F;&#x2F;www.postgresql.org&#x2F;docs&#x2F;9.4&#x2F;static&#x2F;datatype-json.html</a><p>The difference between the types is described in paragraph two. So, they either benchmarked Postgres while having <i>no idea whatsoever what they were doing</i>, or they were deliberately crippling the competition.<p>Neither option is confidence inspiring.<p>(And the first option seems sketchy, seeing how they then went and re-created the whole benchmark as classical RDBMS setup for the second postgres test.)