Other ways to optimize your native application React

A report by Google found that 53% of visitors leave the site or application that takes more than 3 seconds to load. This means that every second of your application does not load, you lose potential customers.

Therefore, in this post we'll focus o n improve the performance of native applications and discuss the problem React length a website developer can face. Developing an application with native React is not so hard to keep up with the performance of the application.

How react indigenous Applications work?

React native uses Javascript and communicates with native components through a bridge. native react depends on three primary son:

The shade tree wire

The UI thread

The native thread

The main part of the React native application consists of:

The native portion that runs on Objective-C, Java or Swift

React Native is built using Javascript

React Native Performance Tips

Looking at the native React GitHub page, you will see that the developers report a lot of errors and problems. These questions are either inherent or implementation. In this article, we will discuss important issues that slow down your application. Understanding how to solve these will help you to deal with other problems.

1. Memory Problems

The problem

Memory leaks are a major problem, especially for Android applications built on indigenous React due to many unnecessary background processes.

You can find leaks using XCode as follows:

a. Go to XCode> Products> Profile

b. Choose Leaks

You can find memory leaks using Android Studio as follows:

a. Start your native application normally React

b. Run Android Studio

vs Go to Tools> Android> Enable Integration of ADB

re. Click Tools> Android> Android device monitor

e. After the Android Device Monitor starts, click the Monitor> Preferences

F. Using Perf monitor to identify memory leaks

The solution

The best way to solve the memory leak problem in React native applications is to use the scroll lists as SectionList, FlatList or VirtualizedList instead of ListView. In addition, the smooth combo paging infinite scroll.

This is important if you build an application with many data points and a pull to refresh feature.

2. Size Image Problems

The problem

The images contribute enormously to the use of high memory in React native applications. No wonder, the image optimization is essential for improving application performance.

react native performance applications

The solution

To solve the problem of the use of high memory caused by the images, you must do the following:

a. Reduce the size of your images

Optimizing images is one of the easiest, but the most important ways to optimize performance. You must optimize image resolution, image size and format to improve performance. Please consider the following:

Use gzip compression for SVG images.

Remove image metadata.

Resize images so that you use the right image to the size of the screen to the right.

Reduce the number of images.

b. Convert your images to the WebP Format

The advantage of using the WebP format is that it can reduce the image loading time as 28%. The WebP format also reduces the size of 66% CodePush beam. In addition, it reduces the Android and iOS binary size.

In addition, the browser transitions are much smoother and native wireless React feels much faster.

compared to the use PNG instead of JPEG

If the color of your application is less than 256 colors for the animation or comics, you must use GIF images. For animations where the image scalability is required, the SVG format is preferable. You have to play with the formats and image resolutions to ensure that the application provides the best performance.

re. Local Image Caching

setting image cache is where the application stores a copy of the image on the phone memory. , Which allows images load faster. The bad news is that for now, the image cache is only available on iOS.

On Android, you can use some MNP libraries to solve the problem of the image cache. The downside is they do not offer the best performance.

3. Unnecessary Renders

The problem

You must be very careful when implementing the diff state, lifecycle and accessories (like pass properties into the component). This saves you from spending too much work reconciler, which can cause the collapse of yarn FPS.

The solution

Use the approach of the life cycle "of shouldComponentUpdate" as a boolean (true or false, it returns on which we decide if the new component is or not). This helps determine if the component is updated. In addition, you should prefer the creation of a small number of components.

4. Optimize the JSON data

The problem

Mobile applications will still need to load resources from the URL and remote services. This is why you should look for requests to obtain data from a remote server.

react profiling native performance

When you pull data from a private or public API, you will receive data in JSON format, which consists of nested objects compounds. What most developers do is they use the same JSON received. This is a bad idea because your application performance suffers slowly JSON Javascript.

The solution

You must convert the raw data JSON simple objects before rendering.

5. App large

The problem

Because you use the most external libraries, which tends to affect the size of the application. Reducing the size of the application is all about money.

The solution

To reduce the size of the application, you can use ProGuard, which allows you to create different sizes of applications for devices on a different architecture. Also, remember to compress graphics such as images.

You can also move components in the hometown of Aboriginal React kingdom. Javascript components use a bridge to communicate with the native side. Reducing the size of the application reduces the load on the bridge, improving application performance.

reacting native performance tips

In addition, all pass code libraries tends to slow the rendering process. There are elements that use a lot of queues messages when communicating with the native side. It's a good idea not to go native thread.

6. native UI frozen in React

The problem

A frozen UI occurs when there is a long operation on the wire, block the thread rendering user interface. This problem worsens when rendering large files, custom animations, raw JSON, and map data.

The solution

To solve the problem of frozen UI, you must avoid Finalizers objects and avoid running heavy objects on the main thread.

7. Using Maps in React Native Applications

The problem

If your application contains a map feature, you discover that the navigation and functionality Chase slow in Aboriginal communities React.

The solution

When integrating the map function in your application, remember to remove console.log, it does not store any data in XCode. You should also disable automatic updating of geographic regions.

Cards in React Native Applications

As you can see, the goal is to reduce the wireless load time is enabled, which improves interaction with the map.

8. multithreading

The problem

Aboriginal React does not support multithreading, which means that many services can not operate simultaneously. This means that when a native visited React component, other components have to wait until the first is made.

The solution

If your application needs a function of multithreading, then you should probably build your application using a technology that supports multithreading. For example, Twitch was forced to leave native React because they could not have a live streaming video and live chat feature.

9. Device Orientation

The problem

It has been observed that some accidents React native applications once the policy changes of the screen. This alone can lead to loss of users, especially gamers.

The solution

Initially, the developers have thought that the native orientation response has been one of the solutions. , Navigation However reacts native can not determine the orientation lock on iOS devices.

For more reliable results with the orientation of the camera, your application must listen to the views of the application root.

Other ways to optimize your native application React

a. Use PureComponent

Reacting the PureComponent is an element whose return value is determined by its inputs and the return value is always the same for the same input values. They simply use the data transmitted by the accessories.

Only when accessories are changing the re-rendering application. In components that are not PureComponent, approach shouldComponentUpdate lifecycle to cancel a new rendering useless and false returns in certain scenarios.

b. Use of animation NativeDriver

React native animations look good and are easy to create. The native REACT movie library allows you to use the native driver and sends animations on the bridge on the native side before the animation starts.

Animations use the main thread, which is independent of a blocked Javascript wire. The result is a smoother animation and text frame drops. This is why you must use the native driver React configuring your entertainment.

Finally DxMinds: mobile App Development Company in UK

React native presents a tremendous opportunity for both companies developing mobile applications and developers. It allows you to write an application for Android and iOS using a language: Javascript.

However, as this post shows, there are several things that can slow down your application. The good news is that these problems have a solution, and can help improve the performance of your application.

Let me know if you think we missed one of the best indigenous practices react by commenting below and our expert group certainly look into it.