React is incredibly fast until it’s not. In this rapid-fire talk, we’ll take a look at some of the best practices for keeping your React applications fast as well as some techniques for diagnosing why they’re slow when they are slow. For all of the magic that React provides, it’s still written in JavaScript. If your JavaScript has performance problems, then your React application will as well. We’ll take a look at how to diagnose performance problems, using the developer tools.

React is optimized for performance, but it is possible to accidentally opt out by writing code that is incompatible with these optimizations. We’ll look at tools that have been custom-tailored for React to help suss out these issues and correct them. Finally, we’ll look at other common performance issues as well as have a discussion on when you should optimize for performance and when you shouldn’t. We’ll close our short time together the day by tweaking the build pipeline to pump out progressively more performant versions of our application from the exact same code.

This could also be a workshop!