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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0 IceDragon/65.0.2

Browser: Firefox 65

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
style.display = none	92.3 Ops/sec
classList add hide	147.5 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"); }