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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36 Edg/93.0.961.47

Browser: Chrome 93

Operating system: Windows

Device Platform: Desktop

Date tested: 3 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) { if (obj.hasOwnProperty(key)) console.log(obj[key]) }
Object values forEach
Object.values(obj).forEach(value => 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))