The talks explore various misleading patterns and concepts in React, that seem to be “common knowledge”, but which a lot (if not most) developers either get wrong or are just not aware of those. Some examples, covered in the talk (and more):
* that “react component re-renders when its props change” (this is not true)
* that wrapping a component in React.memo will prevent its re-render (not always true)
* that use of Context causes re-renders and is bad for performance (not always true, sometimes Context can actually reduce the number of re-renders in the app)
* that creating an element like this `const A =
<
Child /
>
` is when the Child's render lifecycle is triggered (not true)

React is a fantastic tool to implement complicated applications fast, we all know it. But are they going to be fast when implemented fast? Let’s talk about re-renders and their danger in react: how easy it is to make a mistake, why some small mistakes can have a huge downstream effect, and how to avoid and prevent them.
This is a deep-dive type of talk, that focuses on why React components re-render, what kind of performance impact it can have, and what to do about it