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Run results for:
Spread operator vs Immutable.js performance for common use cases
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=520190" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Android 14; Mobile; rv:124.0) Gecko/124.0 Firefox/124.0
Browser:
Firefox Mobile 124
Operating system:
Android
Device Platform:
Mobile
Date tested:
2 years ago
Array push - spread
20.8M/s
Object set - spread
13.9M/s
Object set - immutable
6.3M/s
Array push - immutable
3.2M/s
View exact numbers
Test name
Executions per second
✓
Array push - spread
20,791,604 Ops/sec
Object set - spread
13,853,003 Ops/sec
Object set - immutable
6,284,534 Ops/sec
Array push - immutable
3,240,832 Ops/sec
HTML Preparation code:
<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.js" crossorigin="anonymous"></script>
Script Preparation code:
var obj = { b:"hello", c: true, d:7 }; var arr = ['a', 'b', 'c']; var map = Immutable.Map(obj); var list = Immutable.List(arr);
Tests:
Object set - spread
var newVal = { ...obj, b: 'world' };
Object set - immutable
var newVal = map.set('b', 'world');
Array push - spread
var newVal = [ ...arr, 'd' ];
Array push - immutable
var newVal = list.push('d');