Run results for: clear element using replaceChildren vs removeChild

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.2

Device Platform: Mobile

Date tested: one year ago

removeChild

306.5M/s

replaceChildren

28.1M/s

View exact numbers

Test name	Executions per second
✓ removeChild	306,491,904 Ops/sec
replaceChildren	28,118,628 Ops/sec

HTML Preparation code:

<div id="container">
  <div>Foo</div>
  <div>Bar</div>
</div>

Script Preparation code:

const container = document.getElementById("container");

Tests:

removeChild
while (container.firstChild) { container.removeChild(container.firstChild); }
replaceChildren
container.replaceChildren()