Run results for: querySelector vs getElementById

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Mobile Safari/537.36 EdgA/148.0.0.0

Browser: Chrome Mobile 148

Operating system: Android

Device Platform: Mobile

Date tested: 2 months ago

getElementById

19.9M/s

querySelector

8.6M/s

View exact numbers

Test name	Executions per second
✓ getElementById	19,890,130 Ops/sec
querySelector	8,613,771 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->
<sspa id="sspa">
  <span>hello world</span>
</sspa

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:

querySelector
document.querySelector("sspa")
getElementById
document.getElementById("sspa")