Benchmark: Test Set versus Array-like object perfomance

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); } }

Rendered benchmark preparation results:

Previous results

Test case name	Result
Array Obj add
Set add

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Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36

Browser/OS: Chrome 67 on Windows 7

Test name	Executions per second
Array Obj add	895014300.0 Ops/sec
Set add	959709100.0 Ops/sec

Test Set versus Array-like object perfomance (version: 0)