getElementById vs. querySelector

JavaScript performance comparison

Revision 14 of this test case created

Info

Compare the speed of getElementById to querySelector

Preparation code

<p id="foo">
  Foo
</p>
<p id="bar">
  Bar
</p>
<p id="baz">
  Baz
</p>
<script>
Benchmark.prototype.setup = function() {
    < script src = "//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js" > < /script>
};
</script>

Preparation code output

Foo

Bar

Baz

Test runner

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Testing in unknown unknown
Test Ops/sec
getElementById
var bar = document.getElementById("bar");
pending…
querySelector
var bar = document.querySelector("#bar");
pending…
jquery
var bar = jQuery("#bar");
pending…

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