Jeff, Darren and Thinh have written quite a bit about app performance in the forum over the years. You’ll usually find Jeff’s explanations in topics with the keyword “performance”.
I have a tendency to forget the intricacies of what makes an app more performant. A few months ago I wrote up the following, it’s fairly basic and common sense. Unfortunately I don’t go into detail, details that might actually make a difference, precisely because I cannot retain them.
Regardless, the following might be a decent addition to this topic. Thanks for starting it, great idea, app performance is a recurring topic in the forum.