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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/111.0

Browser: Firefox 111

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Script Preparation code:

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

Tests:

Map
map.set(randomU32(), true); let y = map.has(randomU32()); map.delete(randomU32());
Array
arr[randomU32()] = true; let y = randomU32() in arr; delete arr[randomU32()];
Object
obj[randomU32()] = true; let y = randomU32() in obj; delete obj[randomU32()];
Set
set.add(randomU32()); let y = set.has(randomU32()); set.delete(randomU32());