jQuery.fn.each vs. quickEach vs. each2

JavaScript performance comparison

Revision 3 of this test case created by "Cowboy" Ben Alman

Preparation code 

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
  var a = $('<div/>').append(Array(100).join('<a></a>')).find('a');
  
  // My each2 plugin
  (function($) {
   var jq = $([]);
   $.fn.each2 = function(fn) {
    var i = -1;
    while ((jq[0] = this[++i]) && fn.call(jq[0], i, jq) !== false) {}
    return this;
   };
  })(jQuery);
  
  (function($) {
   var jq = $([]);
   $.fn.each2_ref = function(fn) {
    var i = -1,
        elem;
    while ((elem = jq[0] = this[++i]) && fn.call(elem, i, jq) !== false) {}
    return this;
   };
  })(jQuery);
  
  (function($) {
   var jq = $([]);
   $.fn.each2_len = function(fn) {
    var i = -1,
        len = this.length;
    while (++i < len && (jq[0] = this[i]) && fn.call(jq[0], i, jq) !== false) {}
    delete jq[0];
    return this;
   };
  })(jQuery);
  
  (function($) {
   var jq = $([]);
   $.fn.each2_ref_len = function(fn) {
    var i = -1,
        len = this.length,
        elem;
    while (++i < len && (elem = jq[0] = this[i]) && fn.call(elem, i, jq) !== false) {}
    delete jq[0];
    return this;
   };
  })(jQuery);
</script>

Preparation code output

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
no elem ref, no explicit length comparison 
a.each2(function(i, jq) {
 jq; // jQuery object
});
 pending…
elem ref, no explicit length comparison 
a.each2_ref(function(i, jq) {
 jq; // jQuery object
});
 pending…
no elem ref, explicit length comparison 
a.each2_len(function(i, jq) {
 jq; // jQuery object
});
 pending…
elem ref, explicit length comparison 
a.each2_ref_len(function(i, jq) {
 jq; // jQuery object
});
 pending…
original jQuery.fn.each (reference) 
a.each(function(i, elem) {
 $(this); // jQuery object
});
 pending…

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Revisions

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