Run results for: getComputedStyle vs matchMedia (javi 4)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

getComputedStyle

1.5M/s

matchMedia

546K/s

View exact numbers

Test name	Executions per second
✓ getComputedStyle	1,493,768 Ops/sec
matchMedia	545,574 Ops/sec

HTML Preparation code:

<div class="foo"></div>
<style>
.foo {
  transition: none;  
  color: red;
  display: block;
  padding: 20px;
  background-color: blue;
  text-decoration: none;
}
  
.foo:focus {
  text-decoration: underline;
}
</style>

Tests:

getComputedStyle
var el = document.querySelector('.foo'); var result = window.getComputedStyle(el).getPropertyValue('transition');
matchMedia
var el = document.querySelector('foo'); var result = window.matchMedia('(prefers-reduced-motion)').matches;