Run results for: obj vs array

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36

Browser: Chrome 53

Operating system: Linux

Device Platform: Other

Date tested: 8 years ago

Test name	Executions per second
for in	4.2 Ops/sec
forEach	3.9 Ops/sec

Script Preparation code:

var object = {}
var array = []
for (var i = 0; i < 10000; i++) {
  object[i] = { id: i }
  array[i] = { id : i }
}

Tests: