Run results for: Object literal vs Object.create(null) reading

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser: Chrome 114

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Object.create(null) props	4818.7 Ops/sec
object literal props	13866.0 Ops/sec
Object.create(null) iteration	1170.0 Ops/sec
object literal iteration	7613.9 Ops/sec

Tests:

Object.create(null) props
const o = Object.create(null) o.x = 'a string' o.y = 17 o.z = { m: 'an object', n: 97 } const a = []; for (let i = 0; i < 10000; i++) { a.push( o.x ) a.push( o.y ) a.push( o.z ) }
object literal props
const o = { x: 'a string' } o.y = 17 o.z = { m: 'an object', n: 97 } const a = []; for (let i = 0; i < 10000; i++) { a.push( o.x ) a.push( o.y ) a.push( o.z ) }
Object.create(null) iteration
const o = Object.create(null) o.x = 'a string' o.y = 17 o.z = { m: 'an object', n: 97 } const a = []; for (let i = 0; i < 10000; i++) { for (let k in o) { a.push(o[k]); } }
object literal iteration
const o = { x: 'a string' } o.y = 17 o.z = { m: 'an object', n: 97 } const a = []; for (let i = 0; i < 10000; i++) { for (let k in o) { a.push(o[k]); } }