Run results for: Map vs Array vs Object set uint32 key speed

Run details:

User agent: Mozilla/5.0 (Linux; Android 7.1.2; ONE A2005 Build/NJH47F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Mobile Safari/537.36

Browser: Chrome Mobile 69

Operating system: Android 7.1.2

Device Platform: Mobile

Date tested: 5 years ago

Test name	Executions per second
Map	229673.1 Ops/sec
Array	213709.0 Ops/sec
Object	222703.9 Ops/sec

Script Preparation code:

var map = new Map();
var arr = [];
var obj = {};

var randomU32 = function() {
	return Math.random() * (1 << 31) >>> 0;
}

Tests:

Map
map.set(randomU32(), true);
Array
arr[randomU32()] = true;
Object
obj[randomU32()] = true;