Run results for: Map vs Array vs Object vs Set add item speed in 50000 iters 2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser: Chrome 132

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Tests:

Map
let randomU32 = function() { return Math.random() * (1 << 31) >>> 0; } let map = new Map(); for (let i = 0; i <= 50000; i++) { map.set(randomU32(), true); }
Array
let randomU32 = function() { return Math.random() * (1 << 31) >>> 0; } let arr = []; for (let i = 0; i <= 50000; i++) { arr[randomU32()] = true; }
Object
let randomU32 = function() { return Math.random() * (1 << 31) >>> 0; } let obj = {}; for (let i = 0; i <= 50000; i++) { obj[randomU32()] = true; }
Set
let randomU32 = function() { return Math.random() * (1 << 31) >>> 0; } let set = new Set(); for (let i = 0; i <= 50000; i++) { set.add(randomU32()); }