Improve Performance In React Js
The importance of component keys in React.js, Why you need keys for collections in React. 10. Avoiding Props in Initial States. List virtualization, or windowing, is a technique to improve performance when rendering a long list of data. This technique only renders a small subset of rows at any given time and can dramatically reduce the time
Performance matters a lot in any application. In ReactJS, Optimizing the performance is an important task to do before launching a React application. There are different ways to explore optimizing a React application that can help to increase speed and efficiency as well as user experience. ReactJS is a JavaScript library for making UI and apps.
Why Performance Matters in React. Before we jump into the techniques, let's talk about why performance optimization is crucial. you can significantly improve your app's speed and responsiveness. React. Clean Code. Learning To Code. Programming. CICD automation in React.js is no longer optional it's fundamental. In 2025
Reducing a React application's bundle size is a crucial part of this optimization process, as the size of your React application bundle directly affects how quickly it loads. Larger bundle sizes can result in slower loading times and more bandwidth consumption, whereas smaller bundles improve performance and the speed at which pages load initially.
Nevertheless, there are several ways you can speed up your React application. Use the Production Build . If you're benchmarking or experiencing performance problems in your React apps, make sure you're testing with the minified production build. By default, React includes many helpful warnings. These warnings are very useful in development.
With this technique, we can greatly improve the performance of our React app. Here's the demo See the Pen keep component state local by Emadamerho Nefe While we can set up the immutability ourselves, we can also use libraries like Immer and Immutable.js. Here it is in action See the Pen immutable-data-structure by Emadamerho Nefe
Optimizing React app performance is crucial for delivering a smooth and responsive user experience. As React applications grow in complexity, ensuring optimal performance becomes increasingly important. This guide provides 10 proven strategies to enhance React app performance, complete with hands-on code examples and real-world scenarios.
AsyncComponent.js import React, lazy, Suspense from 'react' const DynamicComponent lazy This results in a cleaner DOM structure, which can improve the performance of your React application by reducing the number of elements that the browser has to process and render. Using fragments can also reduce unnecessary markup and
npm run build Create React App next build Next.js. Check bundle size npx source-map-explorer 'buildstaticjs.js' Fix oversized dependencies Replace lodash with lodash-es or moment.js with date-fns. Final Thoughts. Optimizing React apps is not about one magic trick it's about small, deliberate improvements that add up.
React uses a virtual DOM to improve performance. A virtual DOM keeps a copy of the actual DOM and compares it with any changes made in the code. If there are any differences between the two, React will only update the necessary parts in the actual DOM, making the process faster and more efficient.
