how to use react memo hooks
const computeLetterCount = word => {
let i = 0;
while (i < 1000000000) i++;
return word.length;
};
// Memoize computeLetterCount so it uses cached return value if input array ...
// ... values are the same as last time the function was run.
const letterCount = useMemo(() => computeLetterCount(word), [word]);function moviePropsAreEqual(prevMovie, nextMovie) {
return prevMovie.title === nextMovie.title
&& prevMovie.releaseDate === nextMovie.releaseDate;
}
const MemoizedMovie2 = React.memo(Movie, moviePropsAreEqual);
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