MeasureThat.net

Run results for: className vs. setAttribute vs. classList v4

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36
Chrome 121
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
className 1.6 Ops/sec
classList 1783.3 Ops/sec
HTML Preparation code:
AخA
 
1
<div id="foo" class="neki"></div>
Tests:

  • className

     
    var element = document.getElementById("foo");
    var i = 1000;
    while (i--) {
        element.className += " bar bar2 bar3";
    }

  • classList

     
    var element = document.getElementById("foo");
    var i = 1000;
    while (i--) {
        element.classList.add("bar");
        element.classList.add("bar2");
        element.classList.add("bar3");
    }