Run results for: Map vs Array vs Object has uint32 get speed

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.81 Safari/537.36

Browser: Chrome 69

Operating system: Linux

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
Map	4070702.0 Ops/sec
Array	3459720.0 Ops/sec
Object	3511678.0 Ops/sec

Script Preparation code:

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

Tests:

Map
map.get(rand);
Array
arr[rand]
Object
obj[rand]