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Run results for:
object concat vs spread
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<iframe src="https://measurethat.net/Embed?id=485755" 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/119.0.0.0 Safari/537.36
Browser:
Chrome 119
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
concat 10000
4457.2 Ops/sec
spread 100000
3268.8 Ops/sec
concat 5000
12202.0 Ops/sec
spread 5000
9296.9 Ops/sec
Tests:
concat 10000
const data1 = [...Array.from(Array(10000))].map(_ => ({ a: 123, b: '123', c: [1,2,3]})); const data2 = [...Array.from(Array(10000))].map(_ => ({ a: 123, b: '123', c: [1,2,3]})); const concatTest = () => { const result = data1.concat(data2) } concatTest();
spread 100000
const data1 = [...Array.from(Array(10000))].map(_ => ({ a: 123, b: '123', c: [1,2,3]})); const data2 = [...Array.from(Array(10000))].map(_ => ({ a: 123, b: '123', c: [1,2,3]})); const spreadTest = () => { const result = [...data1, ...data2] } spreadTest();
concat 5000
const data1 = [...Array.from(Array(5000))].map(_ => ({ a: 123, b: '123', c: [1,2,3]})); const data2 = [...Array.from(Array(5000))].map(_ => ({ a: 123, b: '123', c: [1,2,3]})); const concatTest = () => { const result = data1.concat(data2) } concatTest();
spread 5000
const data1 = [...Array.from(Array(5000))].map(_ => ({ a: 123, b: '123', c: [1,2,3]})); const data2 = [...Array.from(Array(5000))].map(_ => ({ a: 123, b: '123', c: [1,2,3]})); const spreadTest = () => { const result = [...data1, ...data2] } spreadTest();