johncip

N+1 query problem

• ORMs make it easy to a query per loop iteration, which we want to avoid

eager_load

• single query (left outer join)
• can reference the other table's columns in where

preload

• a few queries (one per table)
• typically faster

johncip

Moving from Phaser 2 → 3: an incomplete guide

Summary

• I found that the best thing was to ask myself what this or that line was meant to accomplish, and then to search labs.phaser.io for a Phaser 3 example of that task.
• Usually the issue is just that a function has moved, or some property now requires a setter.
• There's a real migration guide here: part 1, part 2

Scenes have replaced states (and the game object… mostly)