How To Optimize React Native App Performance In 2021?

Any app or product must have good performance to stand out in market competition. When you work with React native, you may face problems with the performance of your app. So you need to pay attention to performance improvements and best practices for react native app during its development, fix some issues and deliver a great experience to end users. Hence here we’ll discuss some of the tips and best practices to optimize react native app performance. But if you are confused to choose react native for mobile app development, have a look at- Why Use React Native For Mobile App Development?

Tips To Optimize React Native App Performance-

1. Resize And Scale Images-

Optimizing images is important to improve react native app’s performance if the app is built to show a large amount of graphical content or images.  If images are not properly optimized in terms of resolution and size, rendering of multiple images need high memory usage on the device. It may cause app crash because of memory overload. Here are some of the improvements to optimize images in react native app- 

• Use of smaller resolution images
• Use PNG format rather than JPG format
• Using WEBP format for images – it reduces the binary size of image on iOS and android

2. Do Cache All Images Locally-

Catching is a way solve image problems that optimizes overall performance of react native app. But while caching images at the time of loading in your app, you have to save images locally. By caching images locally in the subsequent requests, you won’t just improve the app’s performance but also save a time of loading images. Now, it is time to recall the debate on cross-platform vs native app development for android and ios as here caching with the image component is for ios only not for android.

Let’s see a way to do local image caching:

<Image
  source={{
    uri: ‘https://unsplash.it/200/200?image=8’
    cache: ‘only-if-cached’
  }}
  style={{ … }}
/>

Though react native is particular about image components, it lacks some important solutions to reduce the impact of following issues- 

• Reduced image loading speed
• Attaching multiple images on single screen
• Low app performance
• Poor cache performance
• Image flickering and cache misses

You should consider quick loading image format with react native libraries with great cross platform app development frameworks.

Know more at- https://solaceinfotech.com/blog/how-to-optimize-react-native-app-performance-in-2021/