Run results for: Object.values vs Object.entries loop

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36

Browser: Chrome 86

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
mapForIn	276535.1 Ops/sec
mapValues	1154084.0 Ops/sec

Tests:

mapForIn
const obj = { "1": { id: 1 }, "2": { id: 2 }, "3": { id: 3 }, "4": { id: 4 }, "5": { id: 5 }, "6": { id: 6 }, "7": { id: 7 }, "8": { id: 8 }, "9": { id: 9 }, "10": { id: 10 }, "11": { id: 11 }, "12": { id: 12 }, "13": { id: 13 }, "14": { id: 14 }, "15": { id: 15 }, "16": { id: 16 }, "17": { id: 17 }, "18": { id: 18 }, "19": { id: 19 }, "20": { id: 20 } }; const mapEntries = (func) => Object.entries(obj).map(func); mapEntries((item, index) => item[1]);
mapValues
const obj = { "1": { id: 1 }, "2": { id: 2 }, "3": { id: 3 }, "4": { id: 4 }, "5": { id: 5 }, "6": { id: 6 }, "7": { id: 7 }, "8": { id: 8 }, "9": { id: 9 }, "10": { id: 10 }, "11": { id: 11 }, "12": { id: 12 }, "13": { id: 13 }, "14": { id: 14 }, "15": { id: 15 }, "16": { id: 16 }, "17": { id: 17 }, "18": { id: 18 }, "19": { id: 19 }, "20": { id: 20 } }; const mapValues = (func) => Object.values(obj).map(func); mapValues((item, index) => item);