Run results for: Tag vs. :is()

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Tag name (div)

11.7M/s

Tag name with two (div and span)

3.2M/s

:is Selector with only div

3.2M/s

:is Selector with div and span

2.9M/s

:is Selector with div, span and img

2.5M/s

View exact numbers

Test name	Executions per second
✓ Tag name (div)	11,722,607 Ops/sec
Tag name with two (div and span)	3,217,332 Ops/sec
:is Selector with only div	3,202,730 Ops/sec
:is Selector with div and span	2,928,210 Ops/sec
:is Selector with div, span and img	2,477,338 Ops/sec

HTML Preparation code:

<div class="hello" id="hello" data-hello>Hello</div>

Tests:

Tag name (div)
document.querySelector('div');
Tag name with two (div and span)
document.querySelector('div, span');
:is Selector with only div
document.querySelector(':is(div)');
:is Selector with div and span
document.querySelector(':is(div, span)');
:is Selector with div, span and img
document.querySelector(':is(div, span, img)');