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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Linux

Device Platform: Desktop

Date tested: 2 months ago

Test name	Executions per second
For In	11.8 Ops/sec
Object values	11.6 Ops/sec
Object keys forEach	13.4 Ops/sec
Object entries forEach	10.9 Ops/sec
object values forEach	9.8 Ops/sec
array foreach	11.8 Ops/sec

Script Preparation code:

var obj = new Object()
var arr = (new Array(10000)).fill(0)
var keys = arr.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));
array foreach
arr.forEach(value => console.log(value));

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

For In

Object values

Object keys forEach

Object entries forEach

object values forEach

array foreach