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Run results for:
Reflect.set vs Object.assign vs Direct assignment vs Spread operator
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<iframe src="https://measurethat.net/Embed?id=606561" 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/136.0.0.0 Safari/537.36
Browser:
Chrome 136
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Direct assignment
155K/s
Reflect.set
24K/s
Spread operator
9K/s
Object.assign
1K/s
View exact numbers
Test name
Executions per second
✓
Direct assignment
154,860 Ops/sec
Reflect.set
23,809 Ops/sec
Spread operator
8,920 Ops/sec
Object.assign
1,142 Ops/sec
Script Preparation code:
var numbers = Array(1000).fill(null).map((x, i) => i.toString());
Tests:
Reflect.set
numbers.reduce((acc, n) => Reflect.set(acc, n, n) && acc, {});
Object.assign
numbers.reduce((acc, n) => Object.assign(acc, { [n]: n }), {});
Direct assignment
numbers.reduce((acc, n) => { acc[n] = n; return acc }, {});
Spread operator
numbers.reduce((acc, n) => acc = {...acc, [n]: n }, {});