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Why there is no "User timing" section in my Chrome DevTools


According to this article:
Debugging React performance with React 16 and Chrome Devtools.

I want to inspect some performance things of my own website built by React as well. But I cannot see the User timing section in my DevTools. Chrome version with 62.0.3202.89 in my computer, am I missing something?

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Solution

  • I was able to make this work by appending ?react_perf to my url. Not sure why this was so difficult to find... hope it works for you.

    https://reactjs.org/blog/2016/11/16/react-v15.4.0.html#profiling-components-with-chrome-timeline