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Run results for:
Benchmark: flatMap vs reduce vs while vs foreach vs for of
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<iframe src="https://measurethat.net/Embed?id=578312" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Browser:
Chrome 131
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
for of
277K/s
for
221K/s
while
218K/s
foreach
190K/s
flatMap
36K/s
reduce
1K/s
View exact numbers
Test name
Executions per second
✓
for of
276,709 Ops/sec
for
221,181 Ops/sec
while
217,693 Ops/sec
foreach
190,030 Ops/sec
flatMap
35,541 Ops/sec
reduce
1,322 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) }