Did you read the article? It describes optimizations applied inside a relatively low-level building block library, not anywhere near business logic. Heck, the author goes as far to say:

> I apply it in libraries and platform code because applications that I don't control or will not know about will depend on them and therefore I cannot make the assumption whether performance will matter or not for them. Everyday applications I work on typically don't have tight performance requirements so optimization is less prioritized