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Run results for:
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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<iframe src="https://measurethat.net/Embed?id=607626" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:138.0) Gecko/20100101 Firefox/138.0
Browser:
Firefox 138
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one year ago
Array.slice()
45.7M/s
Spread operator
34.1M/s
View exact numbers
Test name
Executions per second
✓
Array.slice()
45,668,668 Ops/sec
Spread operator
34,059,944 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 = ['one', 'two', 'three', {four: 'five'}];
Tests:
Array.slice()
var myCopy = arr.slice()
Spread operator
var myCopy = [...arr]