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Run results for:
Сreate a copy of an array by reference (Spread, Concat, Slice, Splice)
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<iframe src="https://measurethat.net/Embed?id=491123" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Browser:
Chrome 120
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
Concat Array to empty
6782763.0 Ops/sec
Concat empty to Array
4713474.5 Ops/sec
Spread
6927471.5 Ops/sec
Slice
6345391.0 Ops/sec
Splice
26633478.0 Ops/sec
Script Preparation code:
var arr = Array.from({length: 1000}, () => Math.floor(Math.random() * 4000));
Tests:
Concat Array to empty
const result = [].concat(arr);
Concat empty to Array
const result = arr.concat([]);
Spread
const result = [...arr]
Slice
const result = arr.slice()
Splice
const result = arr.splice(0)