Run results for: querySelector vs getElementById

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36 Edg/141.0.0.0

Browser: Chrome 141

Operating system: Windows

Device Platform: Desktop

Date tested: 9 months ago

getElementById

39.5M/s

querySelector

20.8M/s

View exact numbers

Test name	Executions per second
✓ getElementById	39,473,036 Ops/sec
querySelector	20,790,368 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")