How To Improve React App Performance?

When building any react applications, a lot of thought goes into how the application should work and end up looking. The least any team or developer needs to do is to check the performance and look out for techniques to optimize the app for the end user’s experience. A lot of times you overlook this action, but in this article,  sharing five ways you can start optimizing your application for better performance

React app performance

Keeping component state local where necessary

We’ve learned that a state update in a parent component re-renders the parent and its child components. So, to ensure re-rendering a component only happens when necessary, we can extract the part of code that cares about the component state, making it local to that part of the code.

Memoizing react components to prevent unnecessary re-renders

The previous performance technique where refactoring our code gives us a performance boost, here we trade memory space for time. So, we must only memoize a component when necessary. Memoization is an optimization strategy that caches a component-rendered operation, saves the result in memory, and returns the cached result for the same input.

Code-splitting in react using dynamic

Code-splitting is another important optimization technique for a react application. By default, when a react application renders in a browser, a bundle file containing the entire application code loads and serves to users at once. This file generates by merging all the code files needed to make a web application work.

Windowing or list virtualization in react applications

Imagine we have an application where we render several rows of items on a page. Whether or not any of the items display in the browser viewport, they render in the DOM and may affect the performance of our application. With the concept of windowing, we can render to the DOM only the visible portion to the user.

Lazy loading images in react

To optimize an application that consists of several images, we can avoid rendering all of the images at once to improve the page load time. With lazy loading, we can wait until each of the images is about to appear in the viewport before we render them in the DOM.

Conclusion

To successfully optimize our react application, we must first find a performance problem in our application to rectify. In this guide, we’ve explained how to measure the performance of a React application and how to optimize the performance for a better user experience.