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Run results for:
literal, literal spread, reuse, Object.assign
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=541380" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36
Browser:
Chrome 126
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
reuse
8K/s
literal
3K/s
literal spread
977/s
assign
314/s
View exact numbers
Test name
Executions per second
✓
reuse
7,604 Ops/sec
literal
2,954 Ops/sec
literal spread
977 Ops/sec
assign
314 Ops/sec
Script Preparation code:
arr = []; for (let i = 0; i < 10000; i++) { arr.push({ a: Math.random(), b: Math.random(), c: Math.random() }) } total = 0;
Tests:
literal spread
const k = Math.random(); total += arr.map((obj) => { return { d: obj.a + obj.b + k, ...obj, }; }).reduce((total, obj) => { return total + obj.d / obj.c; }, 0);
reuse
const k = Math.random(); const r = { a: 0, b: 0, c: 0, d: 0, }; total += arr.map((obj) => { r.a = obj.a; r.b = obj.b; r.c = obj.c; r.d = obj.a + obj.b + k; return r; }).reduce((total, obj) => { return total + obj.d / obj.c; }, 0);
literal
const k = Math.random(); total += arr.map((obj) => { return { a: obj.a, b: obj.b, c: obj.c, d: obj.a + obj.b + k, }; }).reduce((total, obj) => { return total + obj.d / obj.c; }, 0);
assign
const k = Math.random(); total += arr.map((obj) => { return Object.assign({ d: obj.a + obj.b + k, }, obj); }).reduce((total, obj) => { return total + obj.d / obj.c; }, 0);