Run results for: querySelector vs querySelectorAll vs getElementsByClassName vs querySelector (ID) vs getElementsByID 20x

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

getElementsByClassName

5.8M/s

getElementsByID

5.7M/s

querySelector

4.6M/s

querySelector (ID)

3.4M/s

querySelectorAll

967K/s

View exact numbers

Test name	Executions per second
✓ getElementsByClassName	5,808,707 Ops/sec
getElementsByID	5,656,210 Ops/sec
querySelector	4,615,994 Ops/sec
querySelector (ID)	3,381,791 Ops/sec
querySelectorAll	967,494 Ops/sec

HTML Preparation code:

<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div><div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>
<div class="test" id="test"></div>

Tests:

querySelector
document.querySelector(".test")
querySelectorAll
document.querySelectorAll(".test")
getElementsByClassName
document.getElementsByClassName(".test")
querySelector (ID)
document.querySelector("#test")
getElementsByID
document.getElementById("test")