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Run results for:
Consume Object.entries vs for..in vs for..in fn 22222
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=515479" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 17_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.3.1 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 17
Operating system:
iOS 17.3.1
Device Platform:
Mobile
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
Object.entries no array
6/s
Object.keys no entry
6/s
Object.entries
6/s
for..in no array
6/s
Object.keys
6/s
for..in
5/s
View exact numbers
Test name
Executions per second
✓
Object.entries no array
6 Ops/sec
Object.keys no entry
6 Ops/sec
Object.entries
6 Ops/sec
for..in no array
6 Ops/sec
Object.keys
6 Ops/sec
for..in
5 Ops/sec
Script Preparation code:
var obj = { a: 1, b: 2, c: 3, d: 4, 0: 'a', 1: 'b', str: 'long string', nested: { nested: 0 }, hello: 55.5 };
Tests:
Object.entries
for (let i = 0; i < 10000; i++) { for (let entries = Object.entries(obj), i = entries.length - 1; i >= 0; i--) { console.log(entries[i]) } }
for..in
for (let i = 0; i < 10000; i++) { for (let key in obj) { if (obj.hasOwnProperty(key)) { console.log([key, obj[key]]) } } }
Object.keys
for (let i = 0; i < 10000; i++) { for (let keyArray = Object.keys(obj), i = keyArray.length - 1, key = keyArray[i]; i >= 0; key = keyArray[--i]) { console.log([key, obj[key]]); } }
Object.keys no entry
for (let i = 0; i < 10000; i++) { for (let keyArray = Object.keys(obj), i = keyArray.length - 1, key = keyArray[i]; i >= 0; key = keyArray[--i]) { console.log(key, obj[key]); } }
for..in no array
for (let i = 0; i < 10000; i++) { for (let key in obj) { if (obj.hasOwnProperty(key)) { console.log(key, obj[key]) } } }
Object.entries no array
for (let i = 0; i < 10000; i++) { for (let entries = Object.entries(obj), i = entries.length - 1, entry = entries[i]; i >= 0; entry = entries[i--]) { console.log(entry[0], entry[1]) } }