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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0

Browser: Firefox 59

Operating system: Windows

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
Array Obj add	276230400.0 Ops/sec
Set add	208292800.0 Ops/sec

Script Preparation code:

var iSet = new Set();
var arr = [];
arr.byNum = {};

Tests:

Array Obj add
for (var i = 0;i++;i<50) { for (var j = 1;j++;j<10) { if (!arr.byNum[i]) { arr.push(i); arr.byNum[i] = i; } } }
Set add
for (var i = 0;i++;i<50) { for (var j = 1;j++;j<10) { iSet.add(i); } }