Run results for: Map vs Object 5000 rand

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36

Browser: Chrome 94

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Map lookup	383.1 Ops/sec
Obj lookup	397.2 Ops/sec

Script Preparation code:

var map = new Map();
var obj = {};
function getRandomInt(max) {
  return Math.floor(Math.random() * max);
}   
for(let i = 0 ; i < 5000 ; i++){
  const randomNm = getRandomInt(10000);
  map.set(randomNm, randomNm);
  obj[randomNm] = randomNm;
}

var i = 0, count = 1000, a;

Tests:

Map lookup
for(let i = 0 ; i < 5000 ; i++){ const randomNm = getRandomInt(10000); a = map.get(randomNm); }
Obj lookup
for(let i = 0 ; i < 5000 ; i++){ const randomNm = getRandomInt(10000); a = obj[randomNm]; }

Run results for: Map vs Object 5000 rand

Lookup of map vs object

Map lookup

Obj lookup