Because they still use PostgreSQL engine, very slow.
There is a great talk by Stonebraker about this. (He created PostgreSQL about 3 decades ago and moved on to newer database engines).
There is a great talk by Stonebraker about this. (He created PostgreSQL about 3 decades ago and moved on to newer database engines).
http://blog.jooq.org/2013/08/24/mit-prof-michael-stonebraker...