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Run results for:
Array.slice() vs. Spread operator (10000 items)
For times when a shallow copy of an Array of size 10000 is needed, what is the performance difference between these 2 methods.
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<iframe src="https://measurethat.net/Embed?id=558858" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:131.0) Gecko/20100101 Firefox/131.0
Browser:
Firefox 131
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one year ago
Array.slice()
69K/s
Spread operator
11K/s
View exact numbers
Test name
Executions per second
✓
Array.slice()
69,147 Ops/sec
Spread operator
10,869 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 = new Array(10000).fill(0);
Tests:
Array.slice()
var myCopy = arr.slice()
Spread operator
var myCopy = [...arr]