Run results for: Object.assign vs element.style.*

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser: Chrome 132

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Object.assign

237K/s

style.*

233K/s

View exact numbers

Test name	Executions per second
✓ Object.assign	237,135 Ops/sec
style.*	232,725 Ops/sec

HTML Preparation code:

<div id="el">
  <h2>Lorem ipsum dolor sit amet</h2>
</div>

Script Preparation code:

var el = document.getElementById("el");

Tests:

Object.assign
Object.assign(el.style, { top: "3px", height: "10px", left: "50px", transition: "left 0.5s ease", });
style.*
el.style.top= "3px"; el.style.height="10px"; el.style.left= "50px"; el.style.transition= "left 0.5s ease";