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Run results for:
JavaScript Array concat vs spread vs push
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=499700" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36
Browser:
Chrome 119
Operating system:
Linux
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
Push
75K/s
Spread
71K/s
Concat
68K/s
View exact numbers
Test name
Executions per second
✓
Push
75,367 Ops/sec
Spread
70,610 Ops/sec
Concat
67,864 Ops/sec
Tests:
Concat
const first = Array(1000).fill(null).map((_, i) => i); const second = Array(1000).fill(null).map((_, i) => i + 1000); const third = first.concat(second);
Spread
const first = Array(1000).fill(null).map((_, i) => i); const second = Array(1000).fill(null).map((_, i) => i + 1000); const third = [...first, ...second];
Push
const first = Array(1000).fill(null).map((_, i) => i); const second = Array(1000).fill(null).map((_, i) => i + 1000); const third = []; third.push(...first); third.push(...second);