Run results for: matches vs. complex matches vs closest vs. classList

Run details:

User agent: Mozilla/5.0 (Linux; Android 14; Mobile; rv:126.0) Gecko/126.0 Firefox/126.0

Browser: Firefox Mobile 126

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

classList

284K/s

matches

6K/s

closest

5K/s

matches with more complex selector

4K/s

View exact numbers

Test name	Executions per second
✓ classList	283,965 Ops/sec
matches	5,922 Ops/sec
closest	4,503 Ops/sec
matches with more complex selector	4,006 Ops/sec

HTML Preparation code:

<div class="foo"></div>

Tests:

matches
var element = document.querySelector(".foo"); var i = 1000; while (i--) { element.matches(".foo"); }
closest
var element = document.querySelector(".foo"); var i = 1000; while (i--) { element.closest(".foo"); }
classList
var element = document.querySelector(".foo"); var i = 1000; while (i--) { element.classList.contains("foo"); }
matches with more complex selector
var element = document.querySelector(".foo"); var i = 1000; while (i--) { element.matches("div.bar, dev.baz, div.foo"); }