Tips to improve your React app’s performance

Tips to improve your React app’s performance

Have you ever felt your React application is performing slow? When the application you build tends to grow, this problem is very common. Here, I would like to share a few tips on how to improve any React app’s performance. Clever ways to optimise React applications

Have you ever felt your React application is performing slow? When the application you build tends to grow, this problem is very common. Here, I would like to share a few tips on how to improve any React app’s performance.

Our friends — Chrome DevTools and React Developer Tools

The first step to optimizing is measuring. Only after identifying the bottlenecks that are present in the app, it is possible to eliminate them. Chrome DevTools offer powerful performance measurements for React applications. React Developer Tools also comes with a profiler tool. The profiler can only be used either in development mode or in the production-profiling build of React. Both of these tools help us analyze and measure the performance of our application.

Now, let’s have a look at some tips and tricks to fasten your React application:

1. Avoid mounting/unmounting components frequently

Mounting and unmounting components often are quite expensive. It can cause a  repaint/reflow by the browser which causes other HTML elements to shift around. Instead of completely removing the element from the DOM, you can use certain strategies like setting the CSS opacity to 0, or setting visibility to none. This way, the component will still be in the DOM but invisible, without any performance cost.

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