Performance Tuning Graphics in UIKit App

The performance tuning was very pure. It was kind of like exactly like it says in the manual. You know, you run the time profiler and it says, oh, this function is where you're spending most of your time. And that's exactly like one of the episodes is specifically about sort of performance tuning. But normally I don't enjoy performance tuning that much. Like all the code where the performance problems are actually happening are not your code. It's all kind of a black box. It's happening out of process.