Object keys iteration (v38)

Revision 38 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 < 10; i++) {
  
   data[i] =  '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[keys[i]];
   i++;
}
ready
object-keys 3
var keys = Object.keys(data);
var len = keys.length;
var i;

for (i = 0; i < len; i++) {
  data[keys[i]];
}
ready
obj keys + array pop
var keys = Object.keys(data);
var key;
while (key = keys.pop()) {
   data[key];
}
ready
obj keys + array shift
var keys = Object.keys(data);
var key;
while (key = keys.shift()) {
   data[key];
}
ready
while decrement
var keys = Object.keys(data);
var i = keys.length;

while (--i) {
   data[keys[i]];
}
ready
do while decrement
var keys = Object.keys(data);
var i = keys.length;

do {
   data[keys[i]];
}
while (--i);
ready

Revisions

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