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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10) AppleWebKit/537.36 (KHTML, like Gecko) Version/8.0 Safari/537.36

Browser: Safari 8

Operating system: Mac OS X 10.10

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
matches	6108.6 Ops/sec
closest	4854.0 Ops/sec
classList	9280.5 Ops/sec
matches with more complex selector	4025.7 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"); }