Run results for: style.display = none vs. classList add hide

Run details:

User agent: Mozilla/5.0 (Windows NT 5.1; rv:68.0) Gecko/20100101 Goanna/4.8 Firefox/68.0 Basilisk/52.9.0

Browser: Firefox 68

Operating system: Windows XP

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
style.display = none	36.2 Ops/sec
classList add hide	56.7 Ops/sec

HTML Preparation code:

<style type="text/css">
        .hide {
            display: none;
        }
</style>
<div id="foo"></div>

Tests:

style.display = none
var element = document.getElementById("foo"); var i = 3000; while (i--) { element.style.display = 'none'; element.style.display = 'block'; }
classList add hide
var element = document.getElementById("foo"); var i = 3000; while (i--) { element.classList.add("hide"); element.classList.remove("hide"); }