Run results for: className.indexOf vs. className.startsWith 1

Run details:

User agent: Mozilla/5.0 (Android 10; Mobile; rv:87.0) Gecko/87.0 Firefox/87.0

Browser: Firefox Mobile 87

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
indexOf	9452526.0 Ops/sec
startsWith	12590250.0 Ops/sec

HTML Preparation code:

<div id="foo" class="test"></div>

Script Preparation code:

var element = document.getElementById("foo");

Tests: