getElementById vs. querySelector

JavaScript performance comparison

Revision 116 of this test case created by

Preparation code

<p id="foo">Foo</p>
<p id="bar">Bar</p>
<p id="baz">Baz</p>
      
<script>
Benchmark.prototype.setup = function() {
  var $ = document.querySelectorAll;

};
</script>

Preparation code output

<p id="foo">Foo</p> <p id="bar">Bar</p> <p id="baz">Baz</p>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
querySelectorAll
var bar = document.querySelectorAll('#bar');
pending…
mapping querySelectorAll
var bar = $('#bar');
pending…
getElementById
var bar = document.getElementById('bar');
pending…
querySelector
var bar = document.querySelector('#bar');
pending…

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Revisions

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Foo

Bar

Baz