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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36 OPR/80.0.4170.63

Browser: Opera 80

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years 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()); }