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.

Apr 25, 2025 - 10:07
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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.