Run results for: Benchmark: flatMap vs reduce vs while vs foreach

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) GSA/332.1.669373046 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.6

Device Platform: Mobile

Date tested: 2 months ago

Test name	Executions per second
flatMap	37217.1 Ops/sec
reduce	523.6 Ops/sec
while	28723.2 Ops/sec
foreach	54975.6 Ops/sec

Script Preparation code:

var n = 1000

Tests:

flatMap
[...Array(n)].flatMap((x,i) => [++i,i++])
reduce
[...Array(n).keys()].reduce((acc, cur) => [...acc, ++cur, cur++], [])
while
let res = [], i=0; while(n>i++) res.push(i, i);
foreach
let res = []; Array(n).forEach((_,i) => res.push(i+1, i+1))