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Run results for:
Array(1,000,000 length) Mapping | Array.from vs Spread
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<iframe src="https://measurethat.net/Embed?id=569583" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:133.0) Gecko/20100101 Firefox/133.0
Browser:
Firefox 133
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
Array.from
149.6 Ops/sec
Spread
104.1 Ops/sec
Script Preparation code:
const largeArray = []; for (let i = 0; i < 1_000_000; i++) { largeArray.push(i); }
Tests:
Array.from
const arrFromMapped = Array.from(largeArray, x => x * 2);
Spread
const arrSpreadMapped = [...largeArray].map(x => x * 2);