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content/docs/reference-react.md

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 ### `React.PureComponent`
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 `React.PureComponent` is similar to [`React.Component`](#reactcomponent). The difference between them is that [`React.Component`](#reactcomponent) doesn't implement [`shouldComponentUpdate()`](/docs/react-component.html#shouldcomponentupdate), but `React.PureComponent` implements it with a shallow prop and state comparison. 
 
 If your React component's `render()` function renders the same result given the same props and state, you can use `React.PureComponent` for a performance boost in some cases.