Run results for: Benchmark: flatMap vs reduce vs while vs foreach vs for of - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.3 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 15

Operating system: iOS 15.3.1

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
flatMap	97793.4 Ops/sec
reduce	485.0 Ops/sec
while	28974.2 Ops/sec
foreach	113539.8 Ops/sec
for	27821.8 Ops/sec
for of	215672.2 Ops/sec

Script Preparation code:

var n = Array.from(Array(1000).keys())

Tests:

flatMap
n.flatMap((x,i) => [++i,i++])
reduce
n.reduce((acc, cur) => [...acc, ++cur, cur++], [])
while
let res = [], i=0; while(n.length>i++) res.push(i, i);
foreach
let res = []; n.forEach((_,i) => res.push(i+1, i+1))
for
let res = []; for (let i = 0; i < n.length; i++) { res.push(i+1, i+1) }
for of
let res = []; for (const i of n) { res.push(i+1, i+1) }

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