Run results for: Object.entries VS Object.keys with obj[key]

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Object.keys with obj[key]	6866314.0 Ops/sec
Object.entries	8780647.0 Ops/sec

Script Preparation code:

var obj = {}

for (const key of 'abcdefghijklmnopqrstuvwxyz'.split())
  obj[key] = Math.random()

​x
 
var obj = {}​for (const key of 'abcdefghijklmnopqrstuvwxyz'.split())  obj[key] = Math.random()

Tests:

Object.keys with obj[key]
Object.keys(obj).map((key) => [key, obj[key]])
Object.keys(obj).map((key) => [key, obj[key]])
Object.entries
Object.entries(obj).map(([key, value]) => [key, value])
Object.entries(obj).map(([key, value]) => [key, value])