Run results for: React useCallback vs inline function vs inline handler

Run details:

User agent: Mozilla/5.0 (Windows NT 5.1; rv:52.0) Gecko/20100101 Firefox/52.0

Browser: Firefox 52

Operating system: Windows XP

Device Platform: Desktop

Date tested: 3 months ago

Test name	Executions per second
Inline function	1710.7 Ops/sec
Hooks	5908.5 Ops/sec
Inline code	4765.6 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.production.min.js"></script>
<div id="root"></div>

Script Preparation code:


function ComponentWithInlineFunction() {
    const [state, setState] = React.useState('test');
    const clickMe = evt => {
        evt.preventDefault();
        console.log(state);
    }
    return React.createElement('button', {
        onClick: clickMe
    }, 'Click me!');
}

function ComponentWithUseCallback() {
    const [state, setState] = React.useState('test');
    const clickMe = React.useCallback(evt => {
        evt.preventDefault();
        console.log(state);
    }, [state]);
    return React.createElement('button', {
        onClick: clickMe
    }, 'Click me!');
}

function ComponentWithInlineClick() {
    const [state, setState] = React.useState('test');

    return React.createElement('button', {
        onClick: (e) => {
            evt.preventDefault();
            console.log(state);
        },
    }, 'Click me!');
}

Tests:

Inline function
ReactDOM.render(React.createElement(ComponentWithInlineFunction), document.getElementById('root'))
Hooks
ReactDOM.render(React.createElement(ComponentWithUseCallback), document.getElementById('root'))
Inline code
ReactDOM.render(React.createElement(ComponentWithInlineClick), document.getElementById('root'))

Run results for: React useCallback vs inline function vs inline handler

Inline function

Hooks

Inline code