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

Run details:

User agent: Mozilla/5.0 (iPad; CPU OS 12_5_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 12

Operating system: iOS 12.5.4

Device Platform: Tablet

Date tested: 3 years ago

Test name	Executions per second
matches	9289.2 Ops/sec
closest	8420.6 Ops/sec
classList	14864.5 Ops/sec
matches with more complex selector	3207.9 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"); }