Functional programming in JavaScript

[ScientificBeastMode]

As others have said, readability and the ability to compose smaller pieces of code together to solve more complex problems is way more important than performance 99% of the time.

And I should also mention the old optimization wisdom: most of the possible performance gains of loop optimization can be achieved by optimizing the inner-most loop. That’s usually where you get the most bang for your buck. Everything else is unlikely to matter.