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Run results for:
Obj iteration v2
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=512429" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 YaBrowser/24.1.0.0 Safari/537.36
Browser:
Yandex Browser 24
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Iterate keys
6.5M/s
Iterate keys use "of syntax"
1.2M/s
Iterate entries
659K/s
View exact numbers
Test name
Executions per second
✓
Iterate keys
6,535,406 Ops/sec
Iterate keys use "of syntax"
1,156,693 Ops/sec
Iterate entries
659,089 Ops/sec
Tests:
Iterate entries
const obj = { 'a1': 'fooo', 'a2': 'fooo', 'a3': 'fooo', 'a4': 'fooo', 'a5': 'fooo', 'a6': 'fooo', 'a7': 'fooo', 'a8': 'fooo', 'a9': 'fooo', 'a11': 'fooo', 'a12': 'fooo', 'a13': 'fooo', 'a14': 'fooo', 'a15': 'fooo', 'a16': 'fooo', 'a17': 'fooo', 'a18': 'fooo', 'a19': 'fooo', 'a20': 'fooo' }; const values = []; for (const [key, value] of Object.entries(obj)) { values.push(key + ':' + value); }
Iterate keys
const obj = { 'a1': 'fooo', 'a2': 'fooo', 'a3': 'fooo', 'a4': 'fooo', 'a5': 'fooo', 'a6': 'fooo', 'a7': 'fooo', 'a8': 'fooo', 'a9': 'fooo', 'a11': 'fooo', 'a12': 'fooo', 'a13': 'fooo', 'a14': 'fooo', 'a15': 'fooo', 'a16': 'fooo', 'a17': 'fooo', 'a18': 'fooo', 'a19': 'fooo', 'a20': 'fooo' }; const values = []; const keys = Object.keys(obj).length; for (let i=1;i<keys.length;i++) { values.push(keys[i] + ':' + obj[keys[i]]); }
Iterate keys use "of syntax"
const obj = { 'a1': 'fooo', 'a2': 'fooo', 'a3': 'fooo', 'a4': 'fooo', 'a5': 'fooo', 'a6': 'fooo', 'a7': 'fooo', 'a8': 'fooo', 'a9': 'fooo', 'a11': 'fooo', 'a12': 'fooo', 'a13': 'fooo', 'a14': 'fooo', 'a15': 'fooo', 'a16': 'fooo', 'a17': 'fooo', 'a18': 'fooo', 'a19': 'fooo', 'a20': 'fooo' }; const values = []; for (const key of Object.keys(obj)) { values.push(key + ':' + obj[key]); }