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Run results for:
Object.create(null) vs Object literal - Creation and Iteration Performance (including Object.keys vs hasOwnPropertyCheck)
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<iframe src="https://measurethat.net/Embed?id=538299" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:129.0) Gecko/20100101 Firefox/129.0
Browser:
Firefox 129
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
Object literal (hasOwnProperty check iteration)
12.5M/s
Object.create
12.2M/s
Object literal (keys() iteration)
10.5M/s
View exact numbers
Test name
Executions per second
✓
Object literal (hasOwnProperty check iteration)
12,477,613 Ops/sec
Object.create
12,176,886 Ops/sec
Object literal (keys() iteration)
10,485,983 Ops/sec
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]]; }