getElementById vs. querySelector

JavaScript performance comparison

Revision 40 of this test case created

Info

Compare the speed of getElementById to querySelector

Preparation code

<p id="canvas">
<p class="js-list">asdasdas</p></p>

Preparation code output

asdasdas

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Testing in unknown unknown
Test Ops/sec
getElementById
var bar = document.querySelector('#canvas .js-list'); 
pending…
querySelector
var bar = document.getElementById('canvas').getElementsByClassName('js-list'); 
pending…
mapping to getElementById
var bar = document.querySelector('#canvas .js-list')[0]; 
pending…
asdasdas
document.querySelectorAll('#canvas .js-list'); 
pending…

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