10 Ways to Boost the Performance of React Native Apps

1. 10 Ways to Boost the Performance of React Native Apps

2. TABLE OF CONTENTS

3. INTRODUCTION Cross-platform app developers vouch for React Native as the most popular framework that offers agility and flexibility. While providing more native-like functionality, this framework boasts of using inherent features to make the apps functional and desirable. However, this application framework comes with its issues, especially regarding its performance. You would have heard how the support for animation is restricted, and this platform doesn't offer parallel processing. These heavy lifting interactions can reduce the speed and impact the overall performance. The community is continuously working towards enhancing the framework to support different functions. But, despite all the various inputs, the apps suffer if there are too many functions added to them. So, is this the end of the road? Not really! Even if the community hasn't been able to make the app foolproof for complex functionality, they have identified ways to improve the performance. Before we dive into how to improve React Native performance, let's look at what hinders the performance.

4. #1. Speed up the Launch The app’s speed is gauged by how fast it is launched. For this purpose, you might need to ensure proper rendering, reduce the app's memory usage, and reduce the bundle size. There are functions within React Native that can help you perform these functions and enhance the performance. We will take you through the two most utilized performance enhancers.

5. #2. Improve Debugging Speed Productivity and app speed is hampered excessively by the debugging rate. You will notice that the number of bugs in an app can lower agility. If you want to speed up the process and ensure the removal of all the bugs, you should use Flipper. It works well with React Native and native app systems. The layout comprises of network inspector and contains a detailed log. 10 Ways to Boost your React Native Application Performance

6. #3. Incorporate Suitable Navigation Navigation can be a speed breaker for your app. It can put your app into questionable performance mode. The best way to deal with it is to incorporate the best-fit animation methods. Here are the four approaches to improve navigation for your application.

7. #4. Avoid Using the Scroll View ScrollView and FlatList are two ways to render lists on your application. This helps get the scrollable lists on the app interface. ScrollView is simpler to implement and can render the list with ease. The only issue with this component list view is that you render all the components. This will impact performance in case the list comprises endless views. It will complicate data handling and slow the app's speed.

8. #5. Cache the Image Files In React Native, the developers coded the image file as a core component. When you code this component, you may face several issues: • It may render many images on a single screen • You might notice problems related to image loading speed • The cache loading may take a while • You may experience image flickering

9. #6. Render Animations with NativeDriver We have already discussed how animations can impact the speed of your code. It can prevent you from rendering huge applications. To ensure the smooth rendering of animated apps, you can use the nativeDriver function. As the name suggests, the function ensures that your animations are passed over the native bridge before processing them on the interface. Your animation would be executed independently and not with the JavaScript threads.

10. #7. Optimize your Images While caching will help with re-rendering, you may want to ensure that images don’t delay your app launch. As a result, it is essential to optimize your images to improve app performance. When you are rendering an app that consists of too many images, it can use up a lot of memory. You can improve the resolution and size to suit the application to avoid that.

11. #8. Optimize React Native Code The code ensures you don’t spend too much time and memory while rendering. Optimizing the code is standard practice and helps deliver suitable applications. It would help if you used PureComponent for text to don’t override the codes and impact the performance. Define the functions and the code correctly and introduce the code that works best in this case.

12. #9. No Arrow Functions If you have been a React Developer for a while, you know how arrow functions can cause re-renders that waste the memory. These callbacks lead to rendering views, and every render creates a new instance for the same process. As a result, it hampers speed, agility, and performance.

13. #10. Implement Memory Optimization When you are rendering apps or even launching them, you will notice a lot of apps running in the background. You will need to use XCode for iOS and Android Device Monitor for Android Studio to watch these unnecessary apps. You need to make sure your app code is optimized to identify memory leaks and improve memory usage. For this purpose, you should use Flatlist for scrollview. You can also use sectionlist and virtual list.

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