Benchmark Run Result for: React.memo vs no React.memo

React.memo vs no React.memo

Date tested: one year ago

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36

Test name	Executions per second
React.memo	20.4 Ops/sec
No React.memo	25.5 Ops/sec

Benchmark definition (click to collapse):

HTML Preparation code:

<div id="root"></div>
<script src="https://unpkg.com/react@16/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.15/lodash.min.js"></script>

Script Preparation code:

var Memo = (props) => {
  return React.createElement("div", { className: props.css });
};

var NoMemo = React.memo((props) => {
  return React.createElement("div", { className: props.css });
});

var list = new Array(1000).fill({css: Math.random()});

Tests:

React.memo
list.forEach((p) => { ReactDOM.render(React.createElement(Memo, p, null), root); });
No React.memo
list.forEach((p) => { ReactDOM.render(React.createElement(NoMemo, p, null), root); });

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