What happens if you don't apply optimization in React?

Question

React

Good afternoon!

This question is of interest. React provides a bunch of little things to optimize, like memo, useCallback, shouldComponentUpdate, keys, etc. And what do they optimize, and what are the consequences of neglecting them? Is it possible to write a relatively healthy, normally functioning application without using these tools, or will it freeze?

Answer 1

It will slow down. However, if applied inappropriately, it will also be. Where is in place, and where is not? And only v8 knows. You have to be a human compiler to optimize React.