In this video, David Gross says something along the lines of "if your data is laid out in a memory inefficient manner, it will be the bottleneck everywhere." If

In this video, David Gross says something along the lines of "if your data is laid out in a memory inefficient manner, it will be the bottleneck everywhere." If you're dependent on a database query for everything, that will be your bottleneck. If your in-memory structures are cache inefficient, that will be your bottleneck. But once you've fixed all of this (if you can), hot paths and whatnot matter https://m.youtube.com/watch?v=8uAW5FQtcvE https://m.youtube.com/watch?v=8uAW5FQtcvE