_istanbul_

I swear there was a thread like this 2 or 3 days ago.

I don't understand your comment. It's not far fetched to have millions of rows to handle. I myself have about 12 million rows (notes mainly), although I don't load everything at the same time, so maybe you're referring to that aspect?

That's exactly my thought. "Blindly" following steps in Math or programming is rewarding only when used to solve bigger problems, to sort of free up working memory.

Learn the fundamentals and keep them surfaced, either through explicit spaced repetition or something that approximates it, such as writing, reading or trying to (re)implement them. Then build up on that. Just don't do more than what you can handle at a time. The goal is to reference at least 80% of the necessary from memory.