Run results for: For in vs Object.*.forEach vs Object.keys

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.88 Safari/537.36

Browser: Chrome 100

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

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(key, obj[key]); }
Object values
for(let key of Object.keys(obj)){ console.log(key, obj[key]); }
Object keys forEach
Object.keys(obj).forEach(key => console.log(key, obj[key]));
Object entries forEach
Object.entries(obj).forEach(([key, value]) => console.log(key, value));