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Run results for:
addEventListener() vs jQuery.on() with mouseEnter
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<iframe src="https://measurethat.net/Embed?id=516642" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:124.0) Gecko/20100101 Firefox/124.0
Browser:
Firefox 124
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
addEventListener
522.4 Ops/sec
addEventListener anon
139.1 Ops/sec
jQuery.on()
26408.5 Ops/sec
jQuery.on() anon
12852.1 Ops/sec
HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script> <div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div> <div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div> <div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div> <div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div> <div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div> <div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div> <div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div> <div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div> <div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div> <div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div>
Script Preparation code:
document.querySelectorAll('div').forEach((e) => { e.onmouseenter = ''; });
Tests:
addEventListener
const f = () => { return 123; }; document.querySelectorAll('div').forEach((e) => { e.addEventListener('mouseenter', f); });
addEventListener anon
document.querySelectorAll('div').forEach((e) => { e.addEventListener('mouseenter', () => { return 123; }); });
jQuery.on()
const f = () => { return 123; }; document.querySelectorAll('div').forEach((e) => { jQuery(e).on('mouseenter', f); });
jQuery.on() anon
document.querySelectorAll('div').forEach((e) => { jQuery(e).on('mouseenter', () => { return 123; }); });