Run results for: insertAdjacentElement() vs append() vs appendChild()

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36

Browser: Chrome 139

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

appendChild()

2.9M/s

insertAdjacentElement()

2.2M/s

append()

2.0M/s

View exact numbers

Test name	Executions per second
✓ appendChild()	2,931,746 Ops/sec
insertAdjacentElement()	2,183,284 Ops/sec
append()	2,015,640 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:

insertAdjacentElement()
const base = document.createElement('div'); const child = document.createElement('span'); base.insertAdjacentElement('beforeend', child);
append()
const base = document.createElement('div'); const child = document.createElement('span'); base.append(child);
appendChild()
const base = document.createElement('div'); const child = document.createElement('span'); base.appendChild(child);