Benchmark: Javascript classList.contains vs element.matches vs classList.some vs classList.every

HTML Preparation code:

<body class="foo bar baz"></body>

Tests:

matches
var i = 1000; while (i--) { if (document.body.matches(".foo.baz")) { return true; } }
classList
var i = 1000; while (i--) { if (document.body.classList.contains('foo') && document.body.classList.contains('baz')) { return true; } }
classList some
var i = 1000; while (i--) { if (['foo', 'baz'].some(className => document.body.classList.contains(className))) { return true; } }
classList every
var i = 1000; while (i--) { if (['foo', 'baz'].every(className => document.body.classList.contains(className))) { return true; } }

Rendered benchmark preparation results:

Previous results

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:145.0) Gecko/20100101 Firefox/145.0

Browser/OS: Firefox 145 on Windows

classList some

7.8M/s

matches

6.6M/s

classList

4.2M/s

classList every

3.9M/s

View exact numbers

Javascript classList.contains vs element.matches vs classList.some vs classList.every (version: 1)