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Run results for:
querySelectorAll data attribute vs class name vs combined
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<iframe src="https://measurethat.net/Embed?id=572404" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Browser:
Firefox 128
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one year ago
class name
2.0M/s
data attribute
1.3M/s
class name with data attribute
1.1M/s
View exact numbers
Test name
Executions per second
✓
class name
1,950,563 Ops/sec
data attribute
1,336,509 Ops/sec
class name with data attribute
1,081,132 Ops/sec
HTML Preparation code:
<div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div>
Tests:
data attribute
var test = document.querySelectorAll('[data-attribute="test"]');
class name
var test = document.querySelectorAll('.test');
class name with data attribute
var test = document.querySelectorAll('.test[data-attribute="test"]');