Run results for: id vs attribute

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser: Chrome 132

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

id selector

7.9M/s

attribute selector

6.8M/s

beginning with attribute selector

6.3M/s

View exact numbers

Test name	Executions per second
✓ id selector	7,909,274 Ops/sec
attribute selector	6,752,296 Ops/sec
beginning with attribute selector	6,298,742 Ops/sec

HTML Preparation code:

<div id="variableContainerSso"></div>

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:

beginning with attribute selector
document.querySelector("div[id^='variableContainerSso']")
attribute selector
document.querySelector("div[id='variableContainerSso']")
id selector
document.querySelector("#variableContainerSso")