Run results for: reduce() vs map().filter() vs flatMap() -asadf

Run details:

User agent: Mozilla/5.0 (Linux; Android 12; DCO-LX9; HMSCore 6.12.2.302) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.88 HuaweiBrowser/14.0.2.311 Mobile Safari/537.36

Browser: Chrome 99

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
map().filter()	1170696.6 Ops/sec
reduce()	3197959.2 Ops/sec
flatMap	162755.2 Ops/sec

Script Preparation code:

var arr = [];
var i = 0;

while (i <= 30) arr[i] = i++;

Tests:

map().filter()
arr.map(x => x/100).filter(x => x % 3)
reduce()
arr.reduce((acc, x) => { if (x % 3) acc.push(x/100); return acc; }, [])
flatMap
arr.flatMap(x => x % 3 ? x/100 : [])

Run results for: reduce() vs map().filter() vs flatMap() -asadf

reduce vs map.filter vs flatMap

map().filter()

reduce()

flatMap