Performance of Array vs. Object (v161)

Revision 161 of this benchmark created on

Description

After seeing http://jsperf.com/javascript-associative-vs-non-associative-arrays, I thought the test could be improved.

Setup

var arr = [],
      i,
      obj = {};
    for (i = 0; i < 10000; i += 1) {
      var o = {
        payload: i
      };
      arr.push(o);
      obj[i] = o;
    }

Test runner

Ready to run.

Testing in
TestOps/sec
Array Performance
var sum = 0;
var x = 0;
var y = arr.length;

for (; x < y; x++) {
  sum += arr[x].payload
}
ready
Using of
var sum = 0;
for (var el of arr) {
  sum += el.payload
}
ready
Using in
var sum = 0;
for (var el in obj) {
  sum += el.payload
}
ready
Using Object.keys()
var sum = 0;
var keys = Object.keys(obj);
var i = 0;
var j = keys.length;

for (; i < j; i++) {
  sum += obj[keys[i]].payload
}
ready

Revisions

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