Run results for: className vs. setAttribute vs. classList many

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36

Browser: Chrome 75

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

HTML Preparation code:

<div id="foo" class="bar1 bar3 bar4 bar6"></div>

Tests:

className
var element = document.getElementById("foo"); var i = 1000; while (i--) { element.className = "bar1 bar2 bar3 bar4 bar5 bar6"; element.className = "bar1 bar3 bar4 bar6"; }
setAttribute
var element = document.getElementById("foo"); var i = 1000; while (i--) { element.setAttribute("class", "bar1 bar2 bar3 bar4 bar5 bar6"); element.setAttribute("class", "bar1 bar3 bar4 bar6"); }
classList
var element = document.getElementById("foo"); var i = 1000; while (i--) { element.classList.add("bar2", "bar5"); element.classList.remove("bar2", "bar5"); }