Benchmark: Object.create(null) vs Object literal - Creation and Iteration Performance (including Object.keys vs hasOwnPropertyCheck)

Tests:

Object.create
const object = Object.create(null); object.a = 1; object.b = 2; object.c = 3; object.d = 4; object.e = 5; object.f = 6; object.g = 7; object.h = 8; let sum = 0, key; for (key in object) { sum += object[key]; }
Object literal (hasOwnProperty check iteration)
const object = {a: 1, b: 2, c: 3, d: 4, e: 5, f: 6, f: 7, h: 8}; let sum = 0, key; for (key in object) { if (object.hasOwnProperty(key)) { sum += object[key]; } }
Object literal (keys() iteration)
const object = {a: 1, b: 2, c: 3, d: 4, e: 5, f: 6, f: 7, h: 8}; const keys = Object.keys(object); let sum = 0; for (let i = 0, key; i < keys.length; i++) { sum += object[keys[i]]; }

Rendered benchmark preparation results:

Previous results

Test case name	Result
Object.create
Object literal (hasOwnProperty check iteration)
Object literal (keys() iteration)

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Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser/OS: Chrome 122 on Mac OS X 10.15.7

Test name	Executions per second
Object.create	2891855.0 Ops/sec
Object literal (hasOwnProperty check iteration)	61023330.0 Ops/sec
Object literal (keys() iteration)	9743506.0 Ops/sec

Object.create(null) vs Object literal - Creation and Iteration Performance (including Object.keys vs hasOwnPropertyCheck) (version: 0)