Benchmark: Function declaration vs Function expression in React v2

HTML Preparation code:

<script crossorigin src="https://unpkg.com/react@16/umd/react.production.min.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.production.min.js"></script>
<div id="dest"></div>

Tests:

function expression
const Hello = ({toWhat}) => React.createElement('div', null, `Hello ${toWhat}`); ReactDOM.render( React.createElement(Hello, {toWhat: 'World'}, null), document.getElementById('dest') );
function declaration
function Hello ({toWhat}) { return React.createElement('div', null, `Hello ${toWhat}`); } ReactDOM.render( React.createElement(Hello, {toWhat: 'World'}, null), document.getElementById('dest') );
function expression var
const Hello = ({toWhat}) => React.createElement('div', null, `Hello ${toWhat}`); ReactDOM.render( React.createElement(Hello, {toWhat: 'World'}, null), document.getElementById('dest') );

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
function expression
function declaration
function expression var

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 6 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser/OS: Chrome 119 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
function expression	532927.3 Ops/sec
function declaration	399698.9 Ops/sec
function expression var	520711.7 Ops/sec

Function declaration vs Function expression in React v2 (version: 0)

Comparing performance of: function expression vs function declaration vs function expression var

Created: one year ago by: Guest

Jump to the latest result

function expression

function declaration

function expression var

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A