jQuery.each vs. for loop

JavaScript performance comparison

Revision 77 of this test case created by Paul Grenier

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script>
  var a = $('*').get(),
      j = 0,
      e;

function bar(i,item) {
   return e = this;
}
</script>

Preparation code output

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Testing in unknown unknown
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…
reverse while
 
var i = a.length
while (i--) {
  e = a[i];
}
 pending…
foreach
 
a.forEach(function( elem ) {
  e = elem;
});
 pending…
jquery each no nest
 
$(a).each(bar);
 pending…

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