querySelector specfic
Test performance of different ways of get just one particular DOM element
Date tested:
4 years ago
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.88 Safari/537.36
Test name
Executions per second
querySelector
1055646.0 Ops/sec
getElementsByClassName
1149392.0 Ops/sec
Benchmark definition (click to collapse):
HTML Preparation code:
<div id="testdiv"> <div id="unique" class="unique" name="unique" data-unique="1">test</div> </div>
Script Preparation code:
var i, imax; var doc = document;
Tests:
querySelector
var test = doc.querySelector('div.unique').innerHTML;
getElementsByClassName
var test = doc.getElementsByClassName('unique')[0].innerHTML;
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