This content originally appeared on DEV Community and was authored by Matin Imam
Optimizing React applications is all about knowing the right tools—and two of the most powerful ones in your toolkit are useMemo and useCallback. These hooks can help you avoid unnecessary re-renders and recalculations, making your app faster and smoother.
What You’ll Learn:
- When and why to use useMemo
- How useCallback can save you from performance pitfalls
- Code examples to get you started
Here’s a sneak peek 👇:
useMemo: Simplify Complex Calculations
useMemo lets you memoize the result of a function. It recalculates only when dependencies change, saving computation time.
const squaredValue = useMemo(() => {
return count * count;
}, [count]);
useCallback: Memoize Functions Like a Pro
useCallback ensures your callback functions are not recreated on every render, preventing unnecessary re-renders in child components.
const handleChange = useCallback((e) => {
setText(e.target.value);
}, []);
Want the Full Breakdown with Examples?
I’ve shared a detailed guide with more examples and explanations on my personal blog.
This content originally appeared on DEV Community and was authored by Matin Imam
Matin Imam | Sciencx (2025-01-12T03:11:38+00:00) 🚀Boost Your React Performance with useMemo and useCallback🚀. Retrieved from https://www.scien.cx/2025/01/12/%f0%9f%9a%80boost-your-react-performance-with-usememo-and-usecallback%f0%9f%9a%80/
Please log in to upload a file.
There are no updates yet.
Click the Upload button above to add an update.