How to Improve React App Performance

Developers love building all sorts of web applications in React because of its ability to process UI components in browsers and update them without unnecessary navigation.  However, that comes at a cost.  The size of a React application can be considered large for most web applications, which causes a toll on performance. The reason for that is React is a front-end library that doesn’t improve the website or application performance on its own; it must be correctly configured and optimized across different aspects. Also, if you plan to attract lots of users to your website, you need to optimize the performance for high traffic conditions to avoid unnecessary hiccups.

For these reasons, knowing how to use best practices and ways for optimizing web applications becomes essential for a developer or product manager for ensuring that your React app delivers a consistent and better user experience, rather than a lagging one. It is an essential part of software development process. In this blog, you will learn how to improve React app performance, especially in high traffic scenarios.
Tips to Improve React App Performance

Here are a few quick tips to help you get started on the right track for improving React app performance.
Use React.PureComponents

For components that use legacy data, you can use React.PureComponents base class, which internally uses the implementation of shouldComponentUpdate() function to reduce the rendering time. This small, yet smart practice can improve your component loading time to a great extent.
Use Immutable Data Structures

Avoid modifying objects directly by making object copies with desired data changes. Use immutable data structures that will automatically apply this process when there is any change in the object state. This will make the state change detection easy, which in turn improves the overall performance of your React app.
Use Production Build

To give code warnings and other useful insights about code, React has node environment checks spread all over the files. While this helps developers, it does not make any sense to pass it through when you deploy your app in the production environment. To remove these unnecessary code lines, make a production build using npm run build as a best practice, and help improve your React app’s performance.
Use Compression (Gzip or Brotli)

To load your client-side JavaScript load faster, compress your JavaScript using tools like Gzip or Brotli. This will make the entire process faster by reducing load time and enhancing the user experience significantly.
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