In this article, we'll discuss ways to improve app performance in React Native projects by analyzing common performance problems and addressing them with dos and don'ts.
Don't use Higher Order Components (HOCs) on the fly
HOCs are a bad React Native app development USA practice, and they make your app slow. One of the reasons for this is that they require deep knowledge of how React works, which can be difficult to grasp if you're just starting out with React Native.
They also require more code and make debugging harder because of all the extra things going on behind the scenes in your application's render functions.
Do use Pure Components wisely
Pure components are the best way to build your React Native app. They're easier to test, maintain and refactor, so you can focus on building the right thing instead of dealing with code that's hard for others to understand or maintain.
Pure components also help you reuse them in other projects—whether it's within your own app or another one built with React Native itself (or any other framework).
Finally, pure components are easier for developers who work on multiple teams/projects at once because they only contain what their specific purpose requires: no state management logic or any other complicated features like lifecycle methods or event handling logic needed by default when using Redux would have been included anyway since all data flows through those two libraries anyway--which makes debugging much faster.
Don't naively share Selectors
Selectors are a powerful tool for building your app's UI. They allow you to build custom views and components without having to write any code, which means that you can spend more time actually writing React code instead of manually creating components and aggregating them together into larger screens.
If you don't use selectors correctly, however, they can cause a lot of headaches when it comes time for performance tuning later down the road!
Don't implement bulk reducers
You can use Redux Devtools to detect performance issues and improve your app's performance. The tool will show you what reducers are being called at any given time, which is useful for debugging and understanding how a reducer works.
If you're using React Native, it's also worth noting that it doesn't have the same level of support for caching as Facebook does with React because it wasn't built from scratch (as opposed to NativeScript).
That means that while you might be able to get away with using an external library like react-native-cache, there may still be places where this isn't possible or necessary—, and these could result in significant slowdowns in your app if left unchecked.
Use the tool to detect your performance issue
One of the best ways to get a handle on your app's performance is to use a tool. There are many tools out there, but we've found that one of our favorites is New Relic.
New Relic has several features that can help you monitor and optimize your React Native app's performance. The first feature is called Application Insights, which gives real-time insights into what's happening with your app at run time.
It also lets you see how well it performs in comparison with other apps running the same version of iOS and Android operating systems, as well as other devices (e.g., iPhone XS Max and iPad Pro). This data can be valuable if you're looking for insights into what may impact how long certain operations take or whether there are any bottlenecks within the code base itself.
Do use an Image Caching solution
Image caching is a technique used in react native app development USA to improve performance by serving the same image from local storage instead of from the server. It's similar to what happens when you add an image to your Instagram feed and see it displayed on your computer or phone, but it's more efficient because you don't have to download each new version of the same photo each time someone views that post.
React Native supports this feature through a library called react-native-image-lazy. The app can request images from its cache if they exist in that file system folder, reducing unnecessary traffic between users' devices and servers while still allowing them access to all images as needed (e-.g., when loading an image into React Native).
We hope you've found the tips and tricks we've shared in this article useful. React Native is a powerful framework that can help you create stunning, performant apps, but there are some pitfalls to avoid when it comes to performance.
By using the right tools and maintaining a high level of code hygiene, you can make sure your app runs smoothly and looks great at all times.