Run results for: Test Set versus Array-like object perfomance to get value

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko

Browser: IE 11

Operating system: Windows

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
Array Object	109445200.0 Ops/sec
Set	98482630.0 Ops/sec

Script Preparation code:

var iSet = new Set();
var arr = [];
arr.byNum = {};

for (var i = 0;i++;i<500) {
    if (!arr.byNum[i]) {
      arr.push(i);
      arr.byNum[i] = i;
    }
  	iSet.add(i);
}

Tests:

Array Object
for (var i = 0;i++;i<500) { let a = arr.byNum[i] }
Set
for (var i = 0;i++;i<500) { let a = iSet.get(i) }

Run results for: Test Set versus Array-like object perfomance to get value

Array Object

Set