Browser Diet - jQuery.each vs. for loop

JavaScript performance comparison

Revision 8 of this test case created by

Preparation code

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script>
  var a = $('*').get(),
      e;
</script>
      
<script>
Benchmark.prototype.setup = function() {
  function customForEach(array, callback, thisArg) {
    var fn = callback,
        index = -1,
        length = array.length;
  
    while (++index < length) {
      if (callback(array[index], index, array) === false) {
        break;
      }
    }
    return array;
  }

};
</script>

Preparation code output

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
jQuery.each
$.each(a, function() {
  e = this;
});
pending…
for loop
for (var i = 0, len = a.length; i < len; i++) {
  e = a[i];
}
pending…
for without caching
for (var i = 0; i < a.length; i++) {
  e = a[i];
}
pending…
alternative for loop
for (var i in a) {
  e = a[i];
}
pending…
reverse for
for (var i = a.length; i--;) {
  e = a[i];
}
pending…
while reverse
var i = a.length;
while (i) {
  e = a[--i];
}
pending…
customForEach
customForEach(a, function(v) {
  e = v;
});
pending…

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Revisions

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