Run results for: For in vs Object.*.forEach vs Object.values vs _.forEach(_.values vs n=arr.length

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser: Chrome 124

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

object values forEach

44/s

Object keys forEach

42/s

n=arr.length

37/s

_.forEach(_.values())

37/s

Object values

36/s

For In

36/s

Object entries forEach

34/s

View exact numbers

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/lodash/4.16.0/lodash.min.js"></script>

Script Preparation code:

var obj = new Object()
var keys = (new Array(10000)).fill(0).map((x, i) => { return i + 1 })
keys.forEach((x) => { obj['prop' + x] = x })

Tests:

For In
for (var key in obj) { console.log(obj[key]); }
Object values
for(let value of Object.values(obj)){ console.log(value); }
Object keys forEach
Object.keys(obj).forEach(key => console.log(obj[key]));
Object entries forEach
Object.entries(obj).forEach(([key, value]) => console.log(key,'->',value));
object values forEach
Object.values(obj).forEach(value => console.log(value));
_.forEach(_.values())
_.forEach(_.values(obj), value => console.log(value))
n=arr.length
const arr = Object.values(obj); for (var i=0, n=arr.length; i < n; ++i){ console.log(arr[i]); }