data-attr

JavaScript performance comparison

Test case created by Stoyan

Preparation code

<div id="div"></div>
<script>
var div = document.getElementById('div');
var Data = function() {
  var warehouse = {};
  var count = 1;
  return {
    reset: function() {
      count = 1;
      warehouse = {};
    },
    set: function (dom, data) {
      if (!dom.__data) {
        dom.__data = "hello" + count++;
      }
      warehouse[dom.__data] = data;
    },
    get: function(dom) {
      return warehouse[dom.__data];
    }
  };
}();
</script>
<script>
Benchmark.prototype.teardown = function() {
    div.setAttribute('data-yo', null);
    div.setAttribute('data-ma', null);
    div.setAttribute('data-la', null);
    div.setAttribute('__data', null);
    Data.reset();
};
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
setAttribute
div.setAttribute('data-yo', 'yo');
div.setAttribute('data-ma', 'ma');
div.setAttribute('data-la', 'la');
var a = div.getAttribute('data-yo');
var b = div.getAttribute('data-ma');
var c = div.getAttribute('data-la');
pending…
Data
Data.set(div, {yo: 'yo', ma: 'ma', la: 'la'});
var data = Data.get(div);
var a = data.yo;
var b = data.ma;
var c = data.la;
pending…
dataset
div.dataset = {yo: 'yo', ma: 'ma', la: 'la'};
var data = div.dataset;
var a = data.yo;
var b = data.ma;
var c = data.la;
pending…

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