Object keys iteration (v49)

Revision 49 of this benchmark created by A1rPun on

Description

Testing Object.keys vs for-in. I see that SlickGrid uses objects with indexed keys rather than arrays. Confused....

Preparation HTML

<script>
  var data = {};
  
  for (var i = 0; i < 10000; i++) {
  
   data[i] = {
      name: 'user ' + i
   };
  
  }
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
for-in
for (var key in data) {
  data[key];
}
ready
object-keys
Object.keys(data).forEach(function(element, index, array) {
  data[element];
});
ready
object-keys 2
var keys = Object.keys(data);
var len = keys.length;
var i = 0;

while (i < len) {
  data[i];
  i++;
}
ready
object-keys 3
var keys = Object.keys(data);
var len = keys.length;
var i;

for (i = 0; i < len; i++) {
  data[i];
}
ready
object-keys 4
var keys = Object.keys(data);
var len = keys.length;

while (len--) {
  data[i];
}
ready
object-keys 5
var keys = Object.keys(data),
  i = keys.length;

for (; --i;) {
  data[i];
}
ready

Revisions

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