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Run results for:
Object.create(null) vs {} unknown property
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<iframe src="https://measurethat.net/Embed?id=505965" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36
Browser:
Chrome 121
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
Object.create(null);
407.6 Ops/sec
{}
347.8 Ops/sec
key in Object.create(null)
408.9 Ops/sec
key in {}
336.0 Ops/sec
Tests:
Object.create(null);
const obj = Object.create(null); const result = []; for (i = 0; i < 100_000; i++) { result.push(obj[i]); }
{}
const obj = {}; const result = []; for (i = 0; i < 100_000; i++) { result.push(obj[i]); }
key in Object.create(null)
const obj = Object.create(null); const result = []; for (i = 0; i < 100_000; i++) { result.push(i in obj); }
key in {}
const obj = {}; const result = []; for (i = 0; i < 100_000; i++) { result.push(i in obj); }