Run results for: Object vs Map lookup: random integer key

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36

Browser: Chrome 113

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Map	14.0 Ops/sec
Object	13.6 Ops/sec

Script Preparation code:

 window.m = new Map();
 window.o = {};
  for (let i = 100000; i < 100000000; i+=1000) {
    var j = Math.floor(Math.random()*999);
    window.m.set(i+j, [12345, 67890])
    window.o[i+j] = [12345, 67890];
  }

Tests:

Map
for (let i = 0; i < 100000; ++i) { arrayo = window.m.get(Math.floor(Math.random()*1000000)); }
Object
for (let i = 0; i < 100000; ++i) { arrayo = window.o[Math.floor(Math.random()*1000000)]; }