Run results for: innerHTML vs replaceChildren + insertAdjacentHTML

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

innerHTML

156K/s

replaceChildren + insertAdjacentHTML

126K/s

View exact numbers

Test name	Executions per second
✓ innerHTML	155,839 Ops/sec
replaceChildren + insertAdjacentHTML	125,842 Ops/sec

Script Preparation code:

const targetElem = document.createElement( 'DIV' );
targetElem.id = 'target';

targetElem.innerHTML = `
	<div>
		<span>Child 1</span>
	</div>
	<div>
		<span>Child 2</span>
	</div>
	<div>
		<span>Child 3</span>
	</div>
`;

document.body.appendChild( targetElem );

Tests:

innerHTML
document.getElementById('target').innerHTML = ` <div> <span>Child 4</span> </div> `;
replaceChildren + insertAdjacentHTML
const target = document.getElementById('target') target.replaceChildren(); target.insertAdjacentHTML( 'beforeend', ` <div> <span>Child 4</span> </div> ` );