getter vs normal function

JavaScript performance comparison

Revision 2 of this test case created

Info

getter vs function access to property

Preparation code

<script>
  var a = {};
  a._id = 42;

  a.__defineGetter__("id", function() {
    return this._id;
  });
  a.getId = function() {
    return this._id;
  };
</script>
<script>
Benchmark.prototype.setup = function() {
    var i, x = 0;
};
</script>

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Testing in unknown unknown
Test Ops/sec
function
for (i = 0; i < 100; i++) {
  x += a.getId();
}
pending…
getter
for (i = 0; i < 100; i++) {
  x += a.id;
}
pending…

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