Browser Diet - jQuery.each vs. for loop

JavaScript performance comparison

Revision 33 of this test case created

Preparation code

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

Preparation code output

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

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Revisions

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