Run results for: insertAdjacentHtml vs innerHTML

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:103.0) Gecko/20100101 Firefox/103.0

Browser: Firefox 103

Operating system: Mac OS X 10.14

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
innerHTML	158.6 Ops/sec
insertAdjacentHTML	270884.0 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> `;
insertAdjacentHTML
document.getElementById( 'target' ).insertAdjacentHTML( 'beforeend', ` <div> <span>Child 4</span> </div> ` );

Run results for: insertAdjacentHtml vs innerHTML

insertAdjacentHtml vs innerHTML

innerHTML

insertAdjacentHTML