Generally, small React apps need no enhancements or optimization, as they are stable and run well. However, if your app loads slowly and takes more than 100 milliseconds to process an event, you need to optimize to ensure it doesn’t affect buyers’ buying behavior.
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In other words, React performance optimization becomes a must when your app is struggling to perform in the market, as slow load time is a common reason for app failure. Luckily, there are many ways to enhance React app performance, and in this article, we will explore the 10+ React Performance Optimization tricks.
By default, React apps draw elements needlessly & every click on an interface element triggers a redraw, which makes the app slow. A simple trick is to optimize the code for efficiency and reduce the redraws.
You can do so by using three optimizat0.0ion methods:
1) React.PureComponent
2) shouldComponentUpdate
3) React.memo
Each of the three works effectively to minimize element redraws and speed up event processing in React apps.
More often than not, the best React Performance Optimization tweaks are the simplest ones, like splitting a code into smaller components. The trick helps you lazily load React components without burdening the React App. How does it work? The process shrinks the bundle size drastically, which in turn, automatically increases speed.
Retrieving specific objects or elements from a list in React requires using the ‘filter’ function, however, the process is not the most efficient and makes the app render the program repeatedly. Fortunately, you can use special libraries like Reselect to implement a quick React Performance Optimization fix. The tool lets you cache calls & data and curtails rendering instances and processing time.
Working with long data lists is more than just time-consuming and also burdens the app, as every function or request makes the code render the list. However, tools like React Window and React Visualization can change the game, as they load only the on-screen items, not the list.
React.memo is another performance enhancer developers love due to its ability to memorize the rendered output, which drops the re-render count and makes the app load and run faster. React.memo is a higher-order component that uses the last rendered result to ensure the app runs without any needless pause.
React apps perform computational operations numerous times, and the process isn’t as benign as it looks. It affects the program response and also the end-user experience. However, you can counter this bother using web workers. They are APIs that help you segregate time-consuming tasks from swift ones. The divide works wonderfully, as when slow operations load on one thread, the app continues the work on another.
Developers wondering how to optimize React apps often find a resort in the react-LazyLoad library. The tool helps you load numerous large images asynchronously and ensures they don’t affect other functions or commands. This fix reduces the load time and makes even the loaded React apps perform swiftly.
The usual way to merge child events in React is via DOM node, but it isn’t the most efficient method. A common React Performance Optimization trick is to use React.Fragments instead, as they let you group child events without wrapping any needless wrappers or DOM nodes.
Even the best React apps have some unnecessary plugins, and though it is okay to leave some though to ensure the app performs extraordinarily, you need to remove most. So, analyzing the app before release for needless plugins is a must. You can do this using the Webpack Bundle Analyzer. It lists all the methods in the package and lets you select and remove the needless ones.
Another React Performance Optimization hack is optimizing server-side processes. As it goes, websites with server-side rendering perform significantly better than ones rendered by the client. So, to ensure server-side rendering works right, it is best to run Gzip compression, as it improves the experience significantly by speeding up data fetch.
So, here’s a quick guide to learning how to optimize React Apps and make them run smoothly. The lesser the load time and response rate, the better the performance, and it is essential to implement most if not all, React Performance Optimization hacks to create hit apps.
Also Read: How To Implement a Modal Component In React
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