Benchmark: querySelector vs querySelectorAll vs getElementsByClassName vs querySelector (ID) vs getElementsByID with lots of elements

HTML Preparation code:

<div class="test" id="test"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></div><div class="test" id="test1"></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: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36

Browser/OS: Chrome 105 on Windows

View result in a separate tab

Test name	Executions per second
querySelector	3706915.0 Ops/sec
querySelectorAll	844793.2 Ops/sec
getElementsByClassName	4773761.0 Ops/sec
querySelector (ID)	2711151.0 Ops/sec
getElementsByID	4158179.0 Ops/sec

querySelector vs querySelectorAll vs getElementsByClassName vs querySelector (ID) vs getElementsByID with lots of elements (version: 0)

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

Created: one year 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