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

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0

Browser: Firefox 138

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

classList

521K/s

matches

7K/s

closest

6K/s

matches with more complex selector

4K/s

View exact numbers

Test name	Executions per second
✓ classList	520,675 Ops/sec
matches	6,552 Ops/sec
closest	6,348 Ops/sec
matches with more complex selector	3,876 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"); }