Run results for: querySelector vs querySelectorAll vs getElementsByClassName when trying to select by group of similar ID elements

Run details:

User agent: Mozilla/5.0 (Android 15; Mobile; rv:136.0) Gecko/136.0 Firefox/136.0

Browser: Firefox Mobile 136

Operating system: Android

Device Platform: Mobile

Date tested: one month ago

Test name	Executions per second
querySelector class	3746736.8 Ops/sec
getElementsByClassName	5951979.5 Ops/sec
getElementById	6026779.0 Ops/sec
querySelector with wildcards	3368481.0 Ops/sec
querySelectorAll with wildcards	1247716.4 Ops/sec

HTML Preparation code:

<div class="test" id="test-1"></div>
<div class="test" id="test-2"></div>
<div class="test" id="test-3"></div>
<div class="test" id="test-4"></div>
<div class="test" id="test-5"></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:

querySelector class
document.querySelector(".test")
getElementsByClassName
document.getElementsByClassName(".test")
getElementById
document.getElementById("#test-1")
querySelector with wildcards
document.querySelector("[id^='test-']");
querySelectorAll with wildcards
document.querySelectorAll("[id^='test-']");

Run results for: querySelector vs querySelectorAll vs getElementsByClassName when trying to select by group of similar ID elements

querySelector class

getElementsByClassName

getElementById

querySelector with wildcards

querySelectorAll with wildcards