Javascript: A question about react stateless function

[ehrudxo]

In the link
https://github.com/reactjs/redux/issues/1176

I found that stateless function is slow because of rendering, so they recommend React function even if it is stateless.

Is there any other reason you suggest stateless function?

[ljharb]

State is toxic and adds cognitive overhead, and it should be avoided whenever possible. SFCs aren't better because they're faster - although in the future they _will_ be faster - they're better precisely because they're stateless.

[ljharb]

In addition, "performance" should always be the last concern, prioritized far after maintainability, clarity/cleanliness, elegance, and after things are tested _and_ benchmarked. A style guide only recommends one option for performance when all options are otherwise equal - a rare occurrence.

[jimbolla]

If you're measuring an actual perf loss due to re-renders of functional components, you can wrap them with recompose's pure, onlyUpdateForKeys, or onlyUpdateForPropTypes.

[ehrudxo]

@ljharb thanks a lot for your comment.