Run results for: For in vs Object.*.forEach vs Object.values #3

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

For in

70/s

Object.keys forEach

67/s

Object.values for of

59/s

Object.values forEach

57/s

Object.entries forEach

45/s

View exact numbers

Script Preparation code:

var obj = new Object()
var keys = (new Array(100000)).fill(0).map((x, i) => { return i + 1 })
keys.forEach((x) => { obj['prop' + x] = x })

Tests:

Object.values for of
let result; for(let value of Object.values(obj)){ result = value; }
Object.keys forEach
let result; Object.keys(obj).forEach(key => result = obj[key]);
Object.entries forEach
let result; Object.entries(obj).forEach(([key, value]) => result = value);
Object.values forEach
let result Object.values(obj).forEach(value => result = value);
For in
let result; for (var key in obj) { result = obj[key]; }