Run results for: React useCallback hook vs. function vs. external

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36 Edg/134.0.0.0

Browser: Chrome 134

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

ComponentWithOuterFunctionUseCallback

1.3M/s

ComponentWithUseCallback

1.2M/s

ComponentWithArrowFunctionOutside

1.1M/s

ComponentWithInlineFunctionOutside

1.0M/s

ComponentWithInlineFunction

817K/s

ComponentWithArrowFunction

730K/s

View exact numbers

Test name	Executions per second
✓ ComponentWithOuterFunctionUseCallback	1,291,806 Ops/sec
ComponentWithUseCallback	1,192,416 Ops/sec
ComponentWithArrowFunctionOutside	1,052,773 Ops/sec
ComponentWithInlineFunctionOutside	1,048,520 Ops/sec
ComponentWithInlineFunction	816,831 Ops/sec
ComponentWithArrowFunction	730,430 Ops/sec

HTML Preparation code:

<!doctype html>
<html>
  <head>
    <title>This is the title of the webpage!</title>
  </head>
  <body>
  	<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.13.1/umd/react.production.min.js"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.13.1/umd/react-dom.production.min.js"></script>
	<div id="root"></div> 
  </body>
</html>

Script Preparation code:

function ComponentWithOuterFunctionUseCallback() {
  function functionToTest(evt) {
	evt.preventDefault();
  }
  const testFunction = React.useCallback(functionToTest, []);
  return React.createElement('button', {onClick: testFunction}, 'Test click');
}

function ComponentWithUseCallback() {
  const testFunction = React.useCallback(evt => evt.preventDefault(), []);
  return React.createElement('button', {onClick: testFunction}, 'Test click');
}

function ComponentWithInlineFunction() {
  function testFunction(evt) {
    evt.preventDefault();
  }
  return React.createElement('button', {onClick: testFunction}, 'Test click');
}

function ComponentWithArrowFunction() {
  const testFunction = (evt) => {
    evt.preventDefault();
  }
  return React.createElement('button', {onClick: testFunction}, 'Test click');
}


const testFunctionInlineOutside = function(evt) {
  return evt.preventDefault();
}
function ComponentWithInlineFunctionOutside() {
  return React.createElement('button', {onClick: testFunctionInlineOutside}, 'Test click');
}

const testFunctionArrowOutside = (evt) => {
  evt.preventDefault();
}
function ComponentWithArrowFunctionOutside() {
  return React.createElement('button', {onClick: testFunctionArrowOutside}, 'Test click');
}

Tests:

ComponentWithOuterFunctionUseCallback
ReactDOM.render(React.createElement(ComponentWithOuterFunctionUseCallback), document.getElementById('root'))
ComponentWithUseCallback
ReactDOM.render(React.createElement(ComponentWithUseCallback), document.getElementById('root'))
ComponentWithInlineFunction
ReactDOM.render(React.createElement(ComponentWithInlineFunction), document.getElementById('root'))
ComponentWithArrowFunction
ReactDOM.render(React.createElement(ComponentWithArrowFunction), document.getElementById('root'))
ComponentWithInlineFunctionOutside
ReactDOM.render(React.createElement(ComponentWithInlineFunctionOutside), document.getElementById('root'))
ComponentWithArrowFunctionOutside
ReactDOM.render(React.createElement(ComponentWithArrowFunctionOutside), document.getElementById('root'))