Run results for: Read Map vs Object

Run details:

User agent: Mozilla/5.0 (Linux; arm_64; Android 13; ASUS_AI2202) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.5993.107 YaBrowser/23.11.3.107.00 SA/3 Mobile Safari/537.36

Browser: Yandex Browser 23

Operating system: Android

Device Platform: Mobile

Date tested: 11 months ago

Test name	Executions per second
Obj / Object.entries()	117.8 Ops/sec
Map / spread	101.5 Ops/sec

Tests:

Obj / Object.entries()
let obj = {}; let map = new Map(); for (let i = 0; i < 10000; i++) { let key = `${i}`.padStart(10, '0'); let val = Math.random(); map.set(key, { key, val }); obj[key] = { key, val }; } for (let i = 0; i < 10000; i++) { let k = Math.floor(10000 * Math.random()); let key = `${k}`.padStart(10, '0'); let val = map.get(key); }
Map / spread
let obj = {}; let map = new Map(); for (let i = 0; i < 10000; i++) { let key = `${i}`.padStart(10, '0'); let val = Math.random(); map.set(key, { key, val }); obj[key] = { key, val }; } for (let i = 0; i < 10000; i++) { let k = Math.floor(10000 * Math.random()); let key = `${k}`.padStart(10, '0'); let val = obj[key]; }

Run results for: Read Map vs Object

Obj / Object.entries()

Map / spread