Loop Test

JavaScript performance comparison

Revision 101 of this test case created by emp

Preparation code


<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>
<script>
  var a = $('*').get(),
      e;
</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…
Underscore each
_.each(a, function() {
  e = this;
})
pending…

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