jQuery.each vs. alternatives

JavaScript performance comparison

Revision 51 of this test case created

Info

Each comparisons

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script>
  var b = $('*'),
      a = b.get(),
      e;

  jQuery.fn.quickEach = (function() {
    var jq = jQuery([1]);
    return function(c) {
      var i = -1,
          el, len = this.length;
      try {
        while (++i < len && (el = jq[0] = this[i]) && c.call(jq, i, el) !== false);
      } catch (e) {
        delete jq[0];
        throw e;
      }
      delete jq[0];
      return this;
    };
  }());
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
jQuery.each with KeyVal
 
$.each(a, function(key, val) {
  e = $(val);
});
 pending…
for loop
 
var len = a.length;
for (var i = 0; i < len; i++) {
  e = $(a[i]);
};
 pending…
alternative for loop
 
for (var i in a) {
  e = $(a[i]);
};
 pending…
jQuery.fn.each
 
b.each(function(i) {
  e = $(this);
});
 pending…
jQuery.fn.quickEach()
 
b.quickEach(function(i) {
  e = this;
});
 pending…

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