Benchmark: querySelector vs querySelectorAll vs getElementsByClassName vs querySelector (ID) vs getElementsByID 20x

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")

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
querySelector
querySelectorAll
getElementsByClassName
querySelector (ID)
getElementsByID

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 7 months ago)

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/OS: Chrome 119 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
querySelector	4615995.0 Ops/sec
querySelectorAll	967494.5 Ops/sec
getElementsByClassName	5808707.0 Ops/sec
querySelector (ID)	3381791.0 Ops/sec
getElementsByID	5656211.0 Ops/sec

querySelector vs querySelectorAll vs getElementsByClassName vs querySelector (ID) vs getElementsByID 20x (version: 0)

Comparing performance of: querySelector vs querySelectorAll vs getElementsByClassName vs querySelector (ID) vs getElementsByID

Created: 7 months ago by: Guest

Jump to the latest result

querySelector

querySelectorAll

getElementsByClassName

querySelector (ID)

getElementsByID

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A