Optimizing ReactJs application performance is crucial for developers who focus on keeping user experience positive and engaged. According to research by experts, a second delay in load time can lead to 7% reduction in conversions, making it imperative for developers to build apps with optimized performance.
For ReactJs-based applications, we are guaranteed a fast UI by default. But as an application scales, developers encounter performance issues. In this blog post, we will talk about essential ways to optimize the performance of a ReactJs application, comprising pre-optimization techniques.
Tips to Optimize ReactJs Application Performance
1. Keep Component State Local
We’ve learned that a state update in a parent component re-renders the parent and its child components. Thus to ensure re-rendering a component only happens when required, ReactJs Development Services can extract the part of code that cares about the component state, making it local to code.
2. Memoizing React Components
Unlike the old performance technique where refactoring our code improves performance, here we trade memory space for time. Hence we must only memoize a component when required. Memoization is an optimization technique that caches a component-rendered strategy, saves the result in memory, and returns the cached result for the same input.
3. Code-splitting in React
Code-splitting is another important strategy followed during ReactJS website development as an optimization technique for any React application. By default, React application renders in a browser, a “bundle” file contain the whole application code and serves to users at once. This file generates by merging all the code files required to make a web application run.
The idea of bundling is helpful as it lowers the number of HTTP requests a page can handle. However, as an application grows, the file sizes increase, thus growing the bundle file. At a specific stage, this continuous file growth lowers the page load speed, reducing the user’s satisfaction.
With code-splitting implementation, React allows splitting a large bundle file into multiple chunks using dynamic import().This strategy greatly improves the page performance of a complex React application.
4. Lazy Loading Images in React
To optimize an application including multiple images, rendering all of the images at once can be eliminated to improve the page load time. With lazy loading feature, we can wait until each of the images is about to appear in the viewport before being rendered in the DOM.
Lazy loading images stops the creation of unnecessary DOM nodes, improving the performance of our React application.
Frequently Asked Questions
1. How do you optimize the React application?
Another way of optimizing a React app is by making sure you bundle your app for production before deploying. By default, your app is in development mode, which means React will include helpful warnings. This can be very useful while you’re developing, but it can make your app size large and responses slower than usual.
2. What makes Reactjs performance faster?
Immutable data is the answer to this problem. By definition, immutable data structures never change. Immutable data allows you to compare direct object references instead of doing deep-tree comparisons. This makes a React app faster.
3. What makes Reactjs performance faster virtual Dom or original DOM?
Virtual DOM is pure JS file and light weight, hence capturing any update in Virtual DOM is much faster than directly updating on Real DOM. React takes a few milliseconds before reconciliation. This allows react to bundle few processes.
To start an optimization process, we must first find a performance problem in our application to correct. In this blog post, we’ve explained the tips to improve React application and how ReactJs web app development service optimize the performance for a better user experience. If you like this post, ensure you share it with your friends. Also, let us know which of the techniques interest you the most.