Run results for: html createElement vs dom parser

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser: Chrome 125

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

createElement

196K/s

dom parser

71K/s

View exact numbers

Test name	Executions per second
✓ createElement	196,185 Ops/sec
dom parser	71,002 Ops/sec

HTML Preparation code:

<html>
  <head>
  </head>
  <body>
    <main class="main">
    </main>
  </body>
</html>

Tests:

dom parser
const parser = new DOMParser(); const doc = parser.parseFromString(`<html> <head> </head> <body> <main class="main"> <h1>moo</h1> </main> </body> </html>`, 'text/html'); const newMain = doc.querySelector('.main'); document.querySelector('.main').replaceWith(newMain);
createElement
const doc = document.createElement('html'); doc.innerHTML = `<html> <head> </head> <body> <main class="main"> <h1>moo</h1> </main> </body> </html>`; const newMain = doc.querySelector('.main'); document.querySelector('.main').replaceWith(newMain);