addEventListener

JavaScript performance comparison

Revision 2 of this test case created by Erick Ribeiro

Preparation code

<button id="button1">
  Click here
</button>
<script>
Benchmark.prototype.teardown = function() {
    document.getElementById("button1").onclick = function(){};
};
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
function inside addEventListener
document.getElementById("button1").addEventListener("click", function() {
  var x = 1;
  var y = 2;
  alert(x + y);
}, false);
pending…
function outside addEventListener
function test() {
  var x = 1;
  var y = 2;
  alert(x + y);
}
document.getElementById("button1").addEventListener("click", test, false);
pending…

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