Performance of Array vs. Object (v249)

Revision 249 of this benchmark created by Dwayne on

Setup

var arr = [],
      i,
      obj = {};
  for(i = 0; i < 10000; i += 1) {
      if (i % 100 === 0) {
        var o = {payload:i};
        arr[i] = o;
        obj[i] = o;
      }
  }

Test runner

Ready to run.

Testing in
TestOps/sec
Object Performance
var sum = 0;
for (var x in obj) {
    sum += obj[x].payload;
}
ready
Array Performance
var sum = 0;

arr.forEach((value, index) => sum += value);
ready
Using Object.entries()
var sum = 0;

Object.entries(obj).forEach(([key, value]) => sum += value);
ready
Object Performance using known length
var sum = 0;
for (var x=0; x<10000; ++x) {
    sum += obj[x].payload
}
ready
Using Object.keys()
var sum = 0;
var keys = Object.keys(obj);
for (var x=0; x<keys.length; ++x) {
    sum += obj[keys[x]].payload
}
ready

Revisions

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