he's not really talking about the performance of the DB though, focusing more on size of the resultant payload thatr gets sent over the wire. In the actual data

he's not really talking about the performance of the DB though, focusing more on size of the resultant payload thatr gets sent over the wire. In the actual database which is traditionally very challenging to scale, projections aren't very expensive. The other things you and GP mention are way more likkely to move the performance needle.