Run results for: Recursive reduce vs recursive flatMap

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser: Chrome 126

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
flatMap	828.0 Ops/sec
reduce	16.1 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, []), ]; }, [])