Correct usage of ORMs if it's not in the database is another important and easy thing to get right. This often gives a 10-1000 times performance improvement jus

Correct usage of ORMs if it's not in the database is another important and easy thing to get right. This often gives a 10-1000 times performance improvement just due to the avoided "ping pong" game by using eg. query annotations that tell the ORM which related objects you'll access.