How To Foster The UI Performance Of App Designed Using React

User interface performance issues in web apps are nothing new. Developers have been dealing with these difficulties for quite some time. This is why, whenever a new language is created, programmers are certain to run into performance concerns. One such programming language is React. It has a DOM that is really quick. It’s fast to the point where it often renders the tree with a lot of useless elements. This causes a UI issue, and developers may be unwilling to continue using the language as a result. But, there are a few approaches that developers can use to overcome speed issues with React-based web apps. In this article, we’ll look at a few of them that the best mobile app development company in USA use. 

React is a type of user interface framework that is regarded as the fastest in regards to rendering performance. Despite the fact that its virtual DOM is known for efficiently rendering elements, UI performance difficulties in small to big web applications are still present.

How Does It Work?

Each React app is made up of several pieces that are arranged in a tree layout. These elements serve the sole goal of providing a user interface based on the support received.

React will compute the differences between the fresh UI and the existing one as fast as data is exchanged. If you want to learn how to increase the performance of your React-based app’s user interface, scroll down and read the best practices for doing so.

shouldComponentUpdate is used to avoid excessive renderings.

The majority of performance-related difficulties in mobile apps are resolved by making tiny adjustments, yet these modifications are sufficient to get your app better in the end.

The shouldComponentUpdate function is one such adjustment that appears minor but can provide sufficient measurable and noticeable performance benefit to your React project.

ShouldComponentUpdate is a react lifetime hook that tells React not to re-render an element if its status doesn’t update.

Consider the following scenario: you have a group with several components and a complex hierarchical structure and one element in the collection updates. It would be a loss of resources for your software to remove the items from the list that aren’t required. You can effectively tell React to skip all the elements, but the one that is updated by defining shouldComponentUpdate.

PureComponent improves performance by removing needless renderings.

If you’re having trouble getting shouldComponentUpdate to work, you could use Pure Component, which is a better efficient version of the React component class. Because Pure Component minimizes the number of render operations in the application, it provides a significant performance boost.

The pure component is identical to the Component class in React, with the exception that it manages the shouldComponentUpdate operation for you.

Employ Navigation Strategies That Are Suitable

The React Native team has actively focused on tackling navigation difficulties for a long time and has solved many of them. However, there are some difficulties that need to be addressed for most apps to deliver a consistent interface.

People may not use your app at all if the navigation across pages is hard. There are four possible approaches to construct navigation in React Native:

iOS Navigator: This tool is only for iOS and will not aid in the creation of Android navigation.

Navigator: Intended solely for the creation of small apps and prototypes. Doesn’t operate well in high-performance or sophisticated applications.

Experiment with navigation: It can be employed in advanced applications, although not everybody loves it due to the difficulty of its execution.

React Navigation: It is widely used in apps and is frequently suggested. React Navigation is a minimalistic navigation framework that may be used both in small and large-scale projects.

If you’re having issues with that, you can hire the best mobile app development agency in USA to do the hard work for you. 

Optimizing speed for slow devices

It’s possible that people will need to utilize the web app you designed on poor devices with slow internet. So don’t get too caught up in the speed and performance of your program on your MacBook. Always take measurements before taking action. It’s not just about the amount of the code but also about its value. 

A high-quality code also makes it easier to manage your code over time. Use the Lighthouse tool to obtain a general notion of what has to be improved, and then use the latest webpack dashboard or webpack bundler analyzer to figure out where you can save space. While developing, use the Chrome React plugin to analyze yours react application.

If you absolutely require all that you import, code splitting and dynamic imports, HTTP/2’s multiplexing and push features, and the new prefetching link attribute can help you boost performance.

There are a number of companies that offer mobile app development services in USA that include speed optimization for slow devices as an exclusive feature as it is quite crucial to make an application that is easily accessible for the ones with poor connection too. 

Images can be scaled and resized.

If your React Native app is designed to display a large number of visual content or photos, it’s critical to optimize images to boost performance. If the pictures are not properly optimized on the basis of resolution and size, rendering many images could result in a significant storage utilization on the device. As a result of the memory excess, your application may collapse.

The following are some picture optimization techniques that can be used in a React Native app:

Using PNG instead of JPG as a file format

Using graphics with a lower resolution

Using the WEBP format for photos – can significantly minimize the binary size of images on iOS and Android by roughly a third!

Image Cache

Image is a core element in React Native. This item displays an image. Howeveroptimize, it lacks an out-of-the-box answer for difficulties such as:

  • On a single screen, rendering a lot of images
  • In general, poor performance
  • Cache loading speed is poor.
  • Flickering image

But, with third-party libraries such as react-native-fast-image, these concerns can be quickly handled. This library is compatible with both iOS and Android and performs well.


The user interface is the very first thing that impresses a user and makes him stay with the application. But there are many possible rendering issues that can surely degrade the performance of your application’s UI. To prevent that, the above were some of the best methods to foster the UI performance of an application created using React. You or the android mobile app development company in USA that you hired must keep these in mind as if the user interface of your app doesn’t perform up to the mark, and you can lose a large number of users.

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