Run results for: classList.contains vs. hasAttribute

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:82.0) Gecko/20100101 Firefox/82.0

Browser: Firefox 82

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Use hasAttribute shorthand	232364608.0 Ops/sec
Use classList	21892636.0 Ops/sec

HTML Preparation code:

<div id="foo" class="bar baz"></div>

AخA
 
<div id="foo" class="bar baz"></div>

Script Preparation code:

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

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

Tests:

Use hasAttribute shorthand
test_element.hasAttribute('class');
test_element.hasAttribute('class');
Use classList
test_element.classList.contains("bar");
test_element.classList.contains("bar");