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Best practice in general is not to use either of those hooks unless you notice performance issues, or have a good reason to, React is optimized pretty well and unless there are serious numbers of rerenders happening they aren't noticeable.

Josh Comeau has a nice overview of useMemo and useCallback, one of my favourites: https://www.joshwcomeau.com/react/usememo-and-usecallback/#w...

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The problem is that they don't work to fix performance issues unless they're implemented all the way up the tree. So if you have a perf-sensitive view, then you'd better hope that your "application frame" components (or anything higher than the perf-sensitive component in the tree) are optimised to avoid re-renders. And it's a massive pain to retrofit this in later if you haven't been strict with it from the start.

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