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Run results for:
Lodash cloneDeep vs Lodash clone vs Array.slice() vs. Object.assign()
For times when a shallow copy is needed, what is the performance difference between these 3 methods.
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=616780" 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/138.0.0.0 Safari/537.36 Edg/138.0.0.0
Browser:
Chrome 138
Operating system:
Windows
Device Platform:
Desktop
Date tested:
11 months ago
Array.slice()
106.1M/s
Lodash clone
47.1M/s
Lodash cloneDeep
2.6M/s
Object.assign()
2.5M/s
View exact numbers
Test name
Executions per second
✓
Array.slice()
106,100,848 Ops/sec
Lodash clone
47,120,752 Ops/sec
Lodash cloneDeep
2,564,822 Ops/sec
Object.assign()
2,472,976 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:
Lodash cloneDeep
var myCopy = _.cloneDeep(arr)
Lodash clone
var myCopy = _.clone(arr)
Array.slice()
var myCopy = arr.slice()
Object.assign()
var myCopy = Object.assign([], arr)