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Run results for:
flatMap() vs map() and flat()
flatMap vs map and flat
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Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:150.0) Gecko/20100101 Firefox/150.0
Browser:
Firefox 150
Operating system:
Windows
Device Platform:
Desktop
Date tested:
4 months ago
flatMap()
239/s
map().flat()
226/s
View exact numbers
Test name
Executions per second
✓
flatMap()
239 Ops/sec
map().flat()
226 Ops/sec
Script Preparation code:
var arr = []; var i = 0; while (i <= 1E5) arr[i] = { num: [1, i++] };
Tests:
map().flat()
arr.map(x => x.num).flat()
flatMap()
arr.flatMap(x => x.num)