Run results for: Yet Another Object.keys vs Object.values

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Object.values

8.6M/s

for-in

3.6M/s

Object.keys

2.8M/s

View exact numbers

Test name	Executions per second
✓ Object.values	8,605,110 Ops/sec
for-in	3,608,013 Ops/sec
Object.keys	2,757,881 Ops/sec

Script Preparation code:

var obj = {
    'a': {
        id: 'a',
        num: 1
    },
    'b': {
        id: 'b',
        num: 1
    },
    'c': {
        id: 'c',
        num: 1
    },
    'd': {
        id: 'd',
        num: 1
    },
    'e': {
        id: 'e',
        num: 1
    },
    'f': {
        id: 'f',
        num: 1
    },
    'g': {
        id: 'g',
        num: 1
    },
};

Tests:

for-in
let sum = 0; for (let key in obj) sum += obj[key].num;
Object.keys
const sum = Object.keys(obj).reduce((acc, k) => acc + obj[k].num, 0);
Object.values
const sum = Object.values(obj).reduce((acc, v) => acc + v.num, 0);