getElementById vs. querySelector

JavaScript performance comparison

Revision 62 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 param = '#foo';
  var res;

};
</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
1 if
if (param[0] == '#') {
  res = document.getElementById(param);
}
pending…
3 if
if (param.indexOf('#') == 0) {
  res = document.getElementById(param);
}
pending…

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Foo

Bar

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