Loop Test

JavaScript performance comparison

Revision 109 of this test case created by Gabriel

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(),
      b = _.extend({}, a),
      e;
</script>
    

Preparation code output

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Underscore each over Object
_.each(b, function() {
  e = this;
})
pending…
jQuery.each over Object
$.each(b, function() {
  e = this;
})
pending…
alternative for loop over Object
for (var i in b) {
  e = b[i];
}
pending…
Underscore each
_.each(a, function() {
  e = this;
})
pending…
while reverse
var i = a.length;
while (i) {
  e = a[--i]
}
pending…
alternative for loop
for (var i in a) {
  e = a[i];
}
pending…
reverse for
var len = a.length;

for (var i = len; i--;) {
  e = a[i];
}
pending…
for without caching
for (var i = 0; i < a.length; i++) {
  e = a[i];
}
pending…
for loop
var len = a.length;

for (var i = 0; i < len; i++) {
  e = a[i];
}
pending…
jQuery.each
$.each(a, function() {
  e = this;
})
pending…

Compare results of other browsers

Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL.

0 Comments