If you visit a site with React in production mode, the icon will have a dark background: If you aren’t sure whether your build process is set up correctly, you can check it by installing React Developer Tools for Chrome. However, they make React larger and slower so you should make sure to use the production version when you deploy the app. These warnings are very useful in development. If you’re benchmarking or experiencing performance problems in your React apps, make sure you’re testing with the minified production build.īy default, React includes many helpful warnings. Nevertheless, there are several ways you can speed up your React application. For many applications, using React will lead to a fast user interface without doing much work to specifically optimize for performance. Internally, React uses several clever techniques to minimize the number of costly DOM operations required to update the UI.
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