Just don't prematurely anything and write code that works. If you know how it works you automatically get an intuition what can be made better and where bottlen

Just don't prematurely anything and write code that works. If you know how it works you automatically get an intuition what can be made better and where bottlenecks might be. Then you refactor it or just do a plain rewrite. It's really that simple. (There are always exceptions obviously)