Benchmark: Realistic: querySelector vs querySelectorAll vs getElementsByClassName vs querySelector (ID) vs getElementsByID

HTML Preparation code:

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

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser/OS: Chrome 135 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
querySelector	24389630.0 Ops/sec
querySelectorAll	4691843.5 Ops/sec
getElementsByClassName	33065460.0 Ops/sec
querySelector (ID)	11245623.0 Ops/sec
getElementsByID	38498800.0 Ops/sec

Related benchmarks:

Realistic: querySelector vs querySelectorAll vs getElementsByClassName vs querySelector (ID) vs getElementsByID (version: 1)

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>

Fastest: N/A

Slowest: N/A