This is mainly what I took from it. The faster way here is almost always the most idiomatic way to do it in the examples, and the reasons why are usually pretty

This is mainly what I took from it. The faster way here is almost always the most idiomatic way to do it in the examples, and the reasons why are usually pretty obvious. And while the individual differences are small, in a language already as slow as Python, starting from the faster, idiomatic code from the start is likely to save a lot of headache down the line.