Here’s an interesting and super useful Chrome extension by Nitin Tulswani that measures React component performance:
React Performance Devtool is a browser extension for inspecting the performance of React Components. It statistically examines the performance of React components based on the measures which are collected by React using window.performance API. Along with the browser extension, the measures can also be inspected in a console.
Also, if you’re interested in learning more about the process of this tool, there’s a great thread that digs into the history of the project.
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react-perf-devtool is a post from CSS-Tricks