<p>When should one use shouldComponentUpdate lifecycle hook; in all the React components I’ve written, I have never found its use? Do you ever use it?</p>
<p>I have read somewhere that you could write your own diff algorithm in this hook? How would you do that?</p>


When should one use shouldComponentUpdate lifecycle hook; in all the React components I’ve written, I have never found its use? Do you ever use it?

I have read somewhere that you could write your own diff algorithm in this hook? How would you do that?

How would you optimize React components with shouldComponentUpdate?

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