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Run results for:
flatMap() vs filter().map() vs map().filter(Boolean)
flatMap vs filter map
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<iframe src="https://measurethat.net/Embed?id=611387" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36 Edg/137.0.0.0
Browser:
Chrome 137
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
10 months ago
Test name
Executions per second
filter().map()
879.0 Ops/sec
flatMap()
983.8 Ops/sec
mapFilter(Boolean)
682.2 Ops/sec
Script Preparation code:
var arr = []; var i = 0; while (i <= 1E5) arr[i] = i++;
Tests:
filter().map()
arr.filter(x => x % 3).map(x => x/100)
flatMap()
arr.flatMap(x => x % 3 ? x/100 : [])
mapFilter(Boolean)
arr.map(x => x % 3 && x/100).filter(Boolean)