Run results for: insertAdjacentHtml vs innerHTML

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0

Browser: Firefox 128

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 8 months ago

Test name	Executions per second
innerHTML	91.2 Ops/sec
insertAdjacentHTML	137520.9 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 );

​x
 
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>
`;

 
document.getElementById( 'target' ).innerHTML += `    <div>        <span>Child 4</span>    </div>`;

insertAdjacentHTML

document.getElementById( 'target' ).insertAdjacentHTML( 'beforeend', `
	<div>
		<span>Child 4</span>
	</div>
` );

 
document.getElementById( 'target' ).insertAdjacentHTML( 'beforeend', `    <div>        <span>Child 4</span>    </div>` );