Benchmark: Object.values vs for in loop v2

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 mapForIn = (func) => { const arr = []; for (let key in obj) { if (Object.hasOwnProperty(obj)) { arr.push(func(obj[key], arr.length - 1)); } } return arr; } mapForIn((item, index) => item);
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);

Rendered benchmark preparation results:

Previous results

Test case name	Result
mapForIn
mapValues

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Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36

Browser/OS: Chrome 70 on Linux

Test name	Executions per second
mapForIn	102407.7 Ops/sec
mapValues	1095584.0 Ops/sec

Object.values vs for in loop v2 (version: 0)