Run results for: React useCallback hook vs. function - MP

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser: Chrome 116

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
ComponentWithUseCallback	218016.6 Ops/sec
ComponentWithArrowFunction	220220.0 Ops/sec

HTML Preparation code:

<!doctype html>
<html>
  <head>
    <title>This is the title of the webpage!</title>
  </head>
  <body>
    <script src="https://cdn.jsdelivr.net/npm/dayjs@1/dayjs.min.js"></script>
  	<script src="https://cdnjs.cloudflare.com/ajax/libs/react/18.2.0/umd/react.production.min.js"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/18.2.0/umd/react-dom.production.min.js"></script>
	<div id="root"></div> 
  </body>
</html>

Script Preparation code:

function ComponentWithUseCallback({ calculatedAt }) {  
  const renderTime = React.useCallback(() => {
    const timeDifference = dayjs(new Date).diff(calculatedAt) / 60000;
    const calculatedTime = dayjs(calculatedAt).format('YYYY-MM-DD');

    return timeDifference
      ? 'ago'
      : calculatedTime;
  }, [ calculatedAt]);
  
  return React.createElement("div", null, renderTime());
}


function ComponentWithArrowFunction({ calculatedAt }) {
  const renderTime = () => {
    const timeDifference = dayjs(new Date).diff(calculatedAt) / 60000;
    const calculatedTime = dayjs(calculatedAt).format('YYYY-MM-DD');

    return timeDifference
      ? 'ago'
      : calculatedTime;
  };
  
  return React.createElement("div", null, renderTime());
}

Tests:

ComponentWithUseCallback
ReactDOM.render(React.createElement(ComponentWithUseCallback, { calculatedAt: '2023-03-01' }), document.getElementById('root'))
ComponentWithArrowFunction
ReactDOM.render(React.createElement(ComponentWithArrowFunction, { calculatedAt: '2023-03-01' }), document.getElementById('root'))