Benchmark: getElementById vs querySelector vs getElementsByClassName vs getElementsByName 2

HTML Preparation code:

<div id="testdiv1">
  <div id="testdiv2" class="unique2" name="unique2" data-unique="2">test</div>
  <div id="testdiv3" class="unique3" name="unique3" data-unique="3">test</div>
</div>

Script Preparation code:

var i, imax;
var doc = document;

Tests:

getElementById
var test = doc.getElementById('testdiv2').innerHTML;
getElementsByClassName
var test = doc.getElementsByClassName('unique2')[0].innerHTML;
getElementsByName
var test = doc.getElementsByName('unique2')[0].innerHTML;
querySelectorAll
var test = doc.querySelectorAll("[data-unique='2']")

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
getElementById
getElementsByClassName
getElementsByName
querySelectorAll

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:86.0) Gecko/20100101 Firefox/86.0

Browser/OS: Firefox 86 on Windows

View result in a separate tab

Test name	Executions per second
getElementById	965400300.0 Ops/sec
getElementsByClassName	6526180.0 Ops/sec
getElementsByName	6459204.0 Ops/sec
querySelectorAll	1031766.0 Ops/sec

getElementById vs querySelector vs getElementsByClassName vs getElementsByName 2 (version: 0)

Test performance of different ways of get just one particular DOM element

Comparing performance of: getElementById vs getElementsByClassName vs getElementsByName vs querySelectorAll

Created: 3 years ago by: Guest

Jump to the latest result

getElementById

getElementsByClassName

getElementsByName

querySelectorAll

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A