Run results for: Change object value vs add class

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36

Browser: Chrome 60

Operating system: Mac OS X 10.12.3

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
Change object value	12471300.0 Ops/sec
Change class when it has a class	2674151.0 Ops/sec
Change class when it has no class	2724797.2 Ops/sec

HTML Preparation code:

<div class="change" id="hasClass"></div>
<div class="" id="hasNoClass"></div>

Script Preparation code:

var object = {a: false};
var hasClass = document.getElementById('hasClass').classList;
var hasNoClass = document.getElementById('hasNoClass').classList;

Tests:

Change object value
object.a = true;
Change class when it has a class
hasClass.remove('change');
Change class when it has no class
hasNoClass.remove('change');

Run results for: Change object value vs add class

Change object value

Change class when it has a class

Change class when it has no class