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Run results for:
4-element Array.slice() vs. Spread operator
For times when a shallow copy of an Array is needed, what is the performance difference between these 2 methods.
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=615828" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0
Browser:
Firefox 128
Operating system:
Linux
Device Platform:
Desktop
Date tested:
11 months ago
Array.slice()
12.3M/s
Spread operator
7.2M/s
Array.slice() with start and end
7.0M/s
View exact numbers
Test name
Executions per second
✓
Array.slice()
12,292,018 Ops/sec
Spread operator
7,243,843 Ops/sec
Array.slice() with start and end
6,956,644 Ops/sec
HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.20/lodash.min.js'></script>
Script Preparation code:
var arr = [1.9, 2.8, 3.7, 4.6];
Tests:
Array.slice()
var myCopy = arr.slice()
Spread operator
var myCopy = [...arr]
Array.slice() with start and end
var myCopy = arr.slice(0, 3)