Benchmark: For in vs Object.keys.forEach

Script Preparation code:

var obj = new Object()
var keys = (new Array(100)).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 keys forEach
Object.keys(obj).forEach(key => console.log(obj[key]))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
For In
Object keys forEach

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one month ago)

User agent: Mozilla/5.0 (Linux; arm_64; Android 14; ASUS_AI2202) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.6367.26 YaBrowser/24.6.6.26.00 SA/3 Mobile Safari/537.36

Browser/OS: Yandex Browser 24 on Android

View result in a separate tab

Test name	Executions per second
For In	1043.1 Ops/sec
Object keys forEach	1041.3 Ops/sec

For in vs Object.keys.forEach (version: 0)

Comparing performance of: For In vs Object keys forEach

Created: 6 years ago by: Guest

Jump to the latest result

For In

Object keys forEach

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A