Since its establishment, React has completely changed the way how frontend developers create and deploy web applications. At the back of a powerful virtual DOM, the library makes UI updates a lot more efficient than they have been, with the promise of making the web applications innovative and high concurrency friendly.
However, amidst the role, it plays in web application development, Reacts developers often complain of one thing – poor optimization. Because of this lack of proper optimization, React apps often perform slowly and inefficiently.
Now, even though react native challenges makes use of multiple techniques to lower the number of costly DOM operations needed for updating the UI, it rarely solves the issue for complex, large-scale web applications.
In this article, we are going to dive into different performance optimization tips for React, making the web app development process more productive.
10 React performance optimization tips that work
Optimizing the performance of React-based web apps is crucial to a point where it decides the efficiency and usage of the platform. Let us look at some of the ways it can be guaranteed.
1. Use immutable data structures
It is an approach used for framing opinionated coding in functional React applications. They do not connect with the web application’s architecture. However, it identifies the application workflow.
The structures help create an opinion to identify the application’s data flow and direction effectively. Presently, a number of web developers are making use of the immutable data for functional programming in frontend development to get benefits like simplified development, tracking of variation, prevention of temporal coupling, and easy testing.
2. Use of functionless components and React.Pure
The function components and React. Pure tends to optimize the React web apps through two key methods.
Function components safeguard the constructing class in line with the bundle size. They are transformed into pure components for UI update optimization through an advanced personalized approach.
This approach comes in handy for analyzing the optimization of React app optimization. At this stage, throttling denotes a delay in the functioning and execution of the web application. It helps execute the function in milliseconds when the react development service pushes an event.
Debouncing means prevention of an event right from the initiation stage with specific codes and minimization of debounced functions.
4. Use React Fragment
In the case of React, there is a need for rendering multiple elements together or returning a group of related elements at the same time. But when the process starts, there comes a need to wrap the elements in a separate element known as the parent element. When not done, it comes back with an error highlighting,” Parsing error: Adjacent JSX elements must be wrapped in an enclosing tag”. So, what developers tend to do is that they enclose the different elements in a div, just like the one shown below –
Here, the div wrapper from lines 5 to 8 will definitely eliminate the parsing error but will also create an extra DOM node, something that should be avoided.
To get better efficiency in addition to removing the parsing error developers can add the React. Fragment in place of the div just like the example we have shown below.
It comes with shorthand concise syntax where it is not necessary to type the React. Fragment; all you need to do is make brackets:
5. Application of Lazy Loading
When it comes to React performance tuning, Lazy Loading comes across as a very useful process. The key idea behind the concept is to load only those components that are genuinely needed.
At the back of this approach, the weight of the web application reduces in a way that the speedier loading of a DOM structure can happen. In the code example shown below, we have given you an idea of how the lazy loading application process works.
6. Dependency optimization
For the performance testing in React, it is crucial to know the number of codes you are using from the list of dependencies, especially because in every project there are a number of dependencies, the majority of which are not even useful. Thus, it becomes crucial for React developers to focus on the important dependencies. And remove the unnecessary functions through the dash-webpack-plugin.
7. Use CDN
The Content Delivery Network is one of the most famous, fastest, and efficient ways to offer static information from the web application. To support the function, presently there are a number of CDN providers in the market, like CloudFare, Google Cloud CDN, CloudFront, etc. Websites and applications make use of the CDNs purely because of four advantages:
- Better performance
- Greater reliability
- Cost savings
- Prevention against cyber-attacks.
CDN tends to depend heavily on the users’ geographies. The CDN server that the user access is called an ‘edge server’, which is necessary to give them an optimal online experience.
8. Use useCallback hook
The useCallback hook tends to come back with a memoized version of the callback which changes only when one of the dependencies changes. Moreover, it gets convenient when you transfer callbacks to an optimized child component, which depends on the reference equality for avoiding unnecessary renders. The code syntax looks like this –
9. Use of production mode flag in Webpack
When making use of the Webpack as a module bundle, a special setting for the production model should be built as a strong set-up for React performance optimization.
The CLI argument “webpack –mode=production” tends to restrict the exposure and optimization of libraries and code development. Using this approach, the file path and source codes remain secure during optimization.
10. Multiple uses of Chunk files
Every React application comes with specific components having dependencies for functions and features. You can segregate the files through the vendors or different outsourcing libraries or codes. For example, multiple commonChunkPlugins are present with the codes app.bundle.js and vendor.bundle.js, which segregate the files with parallel downloading and the browser cache resources.
So here are the many ways React performance optimization can be ensured by developers with the assurance that the web application would run seamlessly and efficiently. We hope that you must have gathered enough insights into how to work on your web app and make it concurrency friendly.