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

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) }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
flatMap
reduce
while
foreach
for
for of

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Linux; Android 10; MI 8 Lite) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Mobile Safari/537.36

Browser/OS: Chrome Mobile 100 on Android

View result in a separate tab

Test name	Executions per second
flatMap	1110.9 Ops/sec
reduce	184.8 Ops/sec
while	4128.0 Ops/sec
foreach	42132.9 Ops/sec
for	4103.1 Ops/sec
for of	47069.8 Ops/sec