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Run results for:
Сreate a copy of an array by reference (Spread, Concat, Slice, Splice)
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=491125" 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
Benchmark engine:
Benchmark.js
Splice
14.4M/s
Spread
4.6M/s
Concat Array to empty
3.8M/s
Concat empty to Array
2.9M/s
Slice
2.0M/s
View exact numbers
Test name
Executions per second
✓
Splice
14,350,373 Ops/sec
Spread
4,606,393 Ops/sec
Concat Array to empty
3,809,612 Ops/sec
Concat empty to Array
2,870,624 Ops/sec
Slice
1,995,679 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)