How to Find if in a Filter View

In my mental model of what's happening here, we don't care about your mental model. Well, okay, I care about the compilers mental model. All right, well, tell me how far off my mental model is from what the compiler's doing. But I would assume that this is the same thing. Your nested loops is kind of. Or maybe I'm wrong, but it's a mischaracterizing,. In my opinion, what would be happening? Because each of these find ifs, when you do a quote unquote find if to get the first kept value or filtered in value, you're going from zero to n where that value exists. And then the second time