React is fast—until it isn’t. As applications grow in complexity, performance issues can creep in. Thankfully, React comes with a built-in tool to help diagnose these issues: React Profiler. In this post, we’ll break down how to use React Profiler, when to use it, and how to interpret its data to make meaningful improvements.

React is fast—until it isn’t. As applications grow in complexity, performance issues can creep in. Thankfully, React comes with a built-in tool to help diagnose these issues: React Profiler.
In this post, we’ll break down how to use React Profiler, when to use it, and how to interpret its data to make meaningful improvements.