MeasureThat.net

Run results for: className vs. setAttribute vs. classList v5

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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 1608.1 Ops/sec
setAttribute 1808.0 Ops/sec
classList 679.0 Ops/sec
HTML Preparation code:
AخA
 
1
<div id="foo" class="demo"></div>
Tests:

  • className

    ​x
     
    var element = document.getElementById("foo");
    var i = 1000;
    while(i > 0) {
      element.className += " bar bar2 bar3";
      i--;
      element.className = "demo"
    }
    ​

  • setAttribute

     
    var element = document.getElementById("foo");
    var i = 1000;
    while(i > 0) {
      element.setAttribute("class", "demo bar bar2 bar3");
      i--;
      element.className = "demo"
    }

  • classList

     
    var element = document.getElementById("foo");
    var i = 1000;
    while(i > 0) {
        element.classList.add("bar");
        element.classList.add("bar2");
        element.classList.add("bar3");
        i--;    
        element.className = "demo"
    }