Benchmark: querySelectorAll vs getElementsByClassName iteration

HTML Preparation code:

<div class="test"></div>
<div class="test"></div>
<div class="test"></div>
<div class="test"></div>
<div class="test"></div>
<div class="test"></div>
<div class="test"></div>
<div class="test"></div>
<div class="test"></div>
<div class="test"></div>

Tests:

querySelectorAll
const allTests = document.querySelectorAll('.test'); allTests.forEach(function (test) {});
getElementsByClassName
const allTests = document.getElementsByClassName('test'); const arrayAllTests = Array.from(allTests); arrayAllTests.forEach(function (test) {});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
querySelectorAll
getElementsByClassName

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.136 YaBrowser/20.2.3.320 (beta) Yowser/2.5 Safari/537.36

Browser/OS: Yandex Browser 20 on Linux

View result in a separate tab

Test name	Executions per second
querySelectorAll	380632.4 Ops/sec
getElementsByClassName	273318.1 Ops/sec

querySelectorAll vs getElementsByClassName iteration (version: 1)

Comparing performance of: querySelectorAll vs getElementsByClassName

Created: 5 years ago by: Registered User

Jump to the latest result

querySelectorAll

getElementsByClassName

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A