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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=541592" 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/128.0.0.0 Safari/537.36 Edg/128.0.0.0
Browser:
Chrome 128
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Direct assignment
116K/s
Reflect.set
6K/s
Spread operator
5K/s
Object.assign
744/s
View exact numbers
Test name
Executions per second
✓
Direct assignment
115,563 Ops/sec
Reflect.set
6,095 Ops/sec
Spread operator
4,555 Ops/sec
Object.assign
744 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 }, {});