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Run results for:
Map vs Foreach mutate array
This test will run map, vs foreach on a larger array and make sure you get a modified array
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<iframe src="https://measurethat.net/Embed?id=627421" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:149.0) Gecko/20100101 Firefox/149.0
Browser:
Firefox 149
Operating system:
Windows
Device Platform:
Desktop
Date tested:
28 days ago
Test name
Executions per second
Map
18.7 Ops/sec
Foreach
4.1 Ops/sec
Script Preparation code:
var largeArray = Array(1000000).fill('x');
Tests:
Map
largeArray = largeArray.map( (value) => { return value+'y';});
Foreach
largeArray.forEach((value, index) => { largeArray[index] = value +'y'; });