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

getElementsByID

38.5M/s

getElementsByClassName

33.1M/s

querySelector

24.4M/s

querySelector (ID)

11.2M/s

querySelectorAll

4.7M/s

View exact numbers

Test name	Executions per second
✓ getElementsByID	38,498,800 Ops/sec
getElementsByClassName	33,065,460 Ops/sec
querySelector	24,389,630 Ops/sec
querySelector (ID)	11,245,623 Ops/sec
querySelectorAll	4,691,844 Ops/sec

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

Go to the latest result

querySelector

querySelectorAll

getElementsByClassName

querySelector (ID)

getElementsByID

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Go to the latest result

querySelector

querySelectorAll

getElementsByClassName

querySelector (ID)

getElementsByID

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

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