Object keys iteration (v24)

Revision 24 of this benchmark created 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 < 5000; i++) {
  
   data[i] =  'user ' + i;
  
  }

  for (var j = i; j < 7500; j++) {
  
   data[j] = undefined;
  
  }
</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[keys[i]];
   i++;
}
ready
object-keys 3
var keys = Object.keys(data);
var len = keys.length;
var i;
var prop;

for (i = 0; i < len; i++) {
prop = keys[i];
if (data[prop] === undefined && !data.hasOwnProperty(prop)) continue;  

data[prop];
}
ready

Revisions

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