React: When to use useMemo and useCallback

Insightful post by Kent C. Dodds on the costs and benefits of React’s useMemo and useCallback.

We hear a lot that you should use React.useCallback to improve performance and that “inline functions can be problematic for performance,” so how could it ever be better to not useCallback?

Just take a step back from React and consider this: Every line of code which is executed comes with a cost.

Measure, and optimize responsibly.

When to useMemo and useCallback →

About the Author

Bramus is a Freelance Web Developer from Belgium. From the moment he discovered view-source at the age of 14 (way back in 1997), he fell in love with the web and has been tinkering with it ever since (more …)

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