From the course: Master React 19 and Next.js 16 with Hands-On Projects and Real-World Applications

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Profiling React apps with React DevTools Profiler

Profiling React apps with React DevTools Profiler

From the course: Master React 19 and Next.js 16 with Hands-On Projects and Real-World Applications

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Profiling React apps with React DevTools Profiler

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In this session, you will apply concepts you've learned so far to avoid unnecessary re-renders in a simple to-do list. You will also learn how to profile your React apps with React DevTools Profiler. Unnecessary re-renders can slow down your app, especially as it grows larger. By the end of this session, you'll be able to identify performance bottlenecks using React DevTools Profiler and prevent them using techniques like Memo and UseCallback. Let's create a Components folder inside Source and add TodoItem.jsx and TodoList.jsx. Moving to TodoItem.jsx, let's create a TodoItem component. Now I am adding a console log inside the ToDoItem component. This will print RenderingToDoItem followed by the ToDo's text to the console every time the component renders. This will help us visualize when and why a component re-renders later on. I am adding a ListItem element to the ToDoItem component. It displays the ToDo.Text and a checkmark if ToDo.Completed is true. Otherwise, it displays a cross…

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