Run results for: DOMParser vs. createElement

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:141.0) Gecko/20100101 Firefox/141.0

Browser: Firefox 141

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

createElement

1.2M/s

DOMParser

151K/s

View exact numbers

Test name	Executions per second
✓ createElement	1,231,744 Ops/sec
DOMParser	150,984 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

/*your preparation JavaScript code goes here
To execute async code during the script preparation, wrap it as function globalMeasureThatScriptPrepareFunction, example:*/
async function globalMeasureThatScriptPrepareFunction() {
    // This function is optional, feel free to remove it.
    // await someThing();
}

Tests:

DOMParser
const html = "<p></p>" const parser = new DOMParser(); const virtualDom = parser.parseFromString(html, 'text/html'); return virtualDom.body.innerText === ''
createElement
const html = "<p></p>" const el = document.createElement('div'); el.innerHTML = html; return el.innerText.trim() === '';

Run results for: DOMParser vs. createElement

Comparing the performance of parsing the innerText from DOMParser vs createElement SPOILER: DOMParser is 4x slower

DOMParser

createElement