Run results for: Recursive reduce vs recursive flatMap

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36

Browser: Chrome 144

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 7 months ago

Benchmark engine: Benchmark.js

flatMap

3K/s

reduce

42/s

View exact numbers

Test name	Executions per second
✓ flatMap	2,838 Ops/sec
reduce	42 Ops/sec

Script Preparation code:

var arrayOfArrays = Array(10_000).fill([{ id: 1 }])

Tests:

flatMap
arrayOfArrays.flatMap((array) => array.flatMap((element) => element.id))
reduce
arrayOfArrays.reduce((result, array) => { const getAllSelectedFacetFilterIdsSelectedInHierarchy = ( listAcc, element ) => [...listAcc, element.id]; return [ ...result, ...array.reduce(getAllSelectedFacetFilterIdsSelectedInHierarchy, []), ]; }, [])