title: Heroku: performance of Mongodb vs. Postgres
body: <p>I'm creating a python pyramid app on Heroku, and I was wondering if anyone can give me some insight on how the performance will compare between MongoDB (via Heroku's MongoHQ add on -> <a href="https://addons.heroku.com/mongohq" rel="nofollow">https://addons.heroku.com/mongohq</a>) and the Heroku's built-in Postgres? It seems to me that MongoDB will be at a huge disadvantage here because its hosted on EC2 rather than locally, so any call to it will have to be on Amazon's remote servers.</p>
  
  <p>But perhaps I'm wrong here. Can someone tell me whether my analysis is off or not?</p>