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 year ago

Benchmark engine: Benchmark.js

getElementById

6.0M/s

getElementsByClassName

6.0M/s

querySelector class

3.7M/s

querySelector with wildcards

3.4M/s

querySelectorAll with wildcards

1.2M/s

View exact numbers

Test name	Executions per second
✓ getElementById	6,026,779 Ops/sec
getElementsByClassName	5,951,980 Ops/sec
querySelector class	3,746,737 Ops/sec
querySelector with wildcards	3,368,481 Ops/sec
querySelectorAll with wildcards	1,247,716 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-']");