This is a pretty useful utility. I have a number of other similar "why did this component re-render" tools listed in the "DevTools" section [0] of my Redux addons list [1]. I also have a large section of articles on React (and Redux) performance [2] in my React/Redux links list [3], which includes articles on measuring perf using various tools, optimizing re-renders, and more.

[0] https://github.com/markerikson/redux-ecosystem-links/blob/ma... .

[1] https://github.com/markerikson/redux-ecosystem-links

[2] https://github.com/markerikson/react-redux-links/blob/master...

[3] https://github.com/markerikson/react-redux-links