Run results for: Set vs Object vs Map doing stuff with clones

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.1.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.1.1

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
✓ Set	99 Ops/sec
Map	61 Ops/sec
Object	59 Ops/sec

Tests:

Set
const set = new Set(); for (let i = 0; i < 1000; ++i) { set.add(`key_${i}`); } let result = 0; for (let j = 0; j < 100; ++j) { const clone = new Set(set); for (let k = -500; k < 500; ++k) { result += clone.has(`key_${k}`); } } console.log(result);
Object
const obj = {}; for (let i = 0; i < 1000; ++i) { obj[`key_${i}`] = true; } let result = 0; for (let j = 0; j < 100; ++j) { const clone = {...obj}; for (let k = -500; k < 500; ++k) { result += clone.hasOwnProperty(`key_${k}`); } } console.log(result);
Map
const map = new Map(); for (let i = 0; i < 1000; ++i) { map.set(`key_${i}`, true); } let result = 0; for (let j = 0; j < 100; ++j) { const clone = new Map(map); for (let k = -500; k < 500; ++k) { result += clone.get(`key_${k}`); } } console.log(result);