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Run results for:
Large Array: concat vs spread vs push
Compares the three mechanisms for combining arrays with 1k arrays
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<iframe src="https://measurethat.net/Embed?id=568720" 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/130.0.0.0 Safari/537.36
Browser:
Chrome 130
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Concat
5.5M/s
Push
631K/s
Spread
334K/s
View exact numbers
Test name
Executions per second
✓
Concat
5,518,470 Ops/sec
Push
631,096 Ops/sec
Spread
334,098 Ops/sec
Script Preparation code:
var arr1 = Array.from(Array(1000).keys());
Tests:
Concat
var arr = []; arr = arr.concat(arr1);
Spread
var arr = []; arr = [...arr, ...arr1];
Push
var arr = []; arr.push(...arr1);