querySelectorAll vs getElementById

JavaScript performance comparison

Revision 73 of this test case created by Andrey Kindin

Preparation code

<p id="foo">bar</p>
      
<script>
Benchmark.prototype.setup = function() {
  var select = function(query){
      if (query[0] == "#"){
        return document.getElementById(query.slice(1));
      }else{
        return document.querySelectorAll(query);
  }
  };

};
</script>

Preparation code output

<p id="foo">bar</p>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
getElementById
var result = document.getElementById('foo');
pending…
if id
var bar = select("#foo");
pending…
querySelectorAll
var result = document.querySelectorAll('#foo');
pending…

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Revisions

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