Run results for: dataset vs setAttribute

Run details:

User agent: Mozilla/5.0 (Android 12; Mobile; rv:121.0) Gecko/121.0 Firefox/121.0

Browser: Firefox Mobile 121

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
dataset	2025.2 Ops/sec
setAttribute	3433.3 Ops/sec

HTML Preparation code:


<div id='set' data-open="0"></div>

Tests:

dataset
const elem = document.getElementById("set"); var i = 1000; while (i--) { elem.dataset.open = "1"; }
setAttribute
const elem = document.getElementById("set"); var i = 1000; while (i--) { elem.setAttribute('data-open', '1') }