MeasureThat.net

Run results for: classList.contains vs. RegExp.test

Go to the benchmark
Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:131.0) Gecko/20100101 Firefox/131.0
Firefox 131
Windows
Desktop
5 months ago
Test name Executions per second
classList 3464.3 Ops/sec
RegExp 2746.7 Ops/sec
HTML Preparation code:
AخA
 
1
<div id="select_true" class="aaa bbb selected"></div>
2
<div id="select_false" class="aaa bbb ccc"></div>
Script Preparation code:
 
var rxSelected = /\bselected\b/i;
Tests:

  • classList

     
    for (var i = 1000; i--; ) {
        document.getElementById("select_true").classList.contains("selected");
        document.getElementById("select_false").classList.contains("selected");
    }

  • RegExp

     
    for (var i = 1000; i--; ) {
        rxSelected.test(document.getElementById("select_true").className);
        rxSelected.test(document.getElementById("select_false").className);
    }