javascriptreactjsprofilerreact-devtools
what does mean this number in react devTools?
I have a Nextjs app that I want to profile for performance issues.
Im using the react dev tool profiler in chrome
I profile a specific interaction and get the flamegraph and the ranked time graph in the dev tool.
Then this message shows up in the dev tool:
Why did this render?
- Hooks 1,7 and 15 changed
This part of the dev tool is not interactive, and I cant find anything on how the hooks are numbered.
How do I interpret these numbers? What do they correspond to? Where can I find the information on what hooks they refer?
Solution
This is answered in this StackOverflow Post: What does the hook numbers in the Reactjs Dev tool correspond to?
As per this React Pull request, the numbers correspond to those shown in the Components tab:
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