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Run results for:
flatMap vs reduce with spread vs reduce with push vs for of
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<iframe src="https://measurethat.net/Embed?id=522064" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Browser:
Chrome 124
Operating system:
Linux
Device Platform:
Desktop
Date tested:
2 years ago
for...of
31K/s
reduce with push
23K/s
flatMap
3K/s
reduce with spread
21/s
View exact numbers
Test name
Executions per second
✓
for...of
31,089 Ops/sec
reduce with push
22,916 Ops/sec
flatMap
3,343 Ops/sec
reduce with spread
21 Ops/sec
Script Preparation code:
var arr = Array(10_000).fill(0)
Tests:
reduce with spread
arr.reduce((acc, x) => [...acc, x], [])
flatMap
arr.flatMap(x => [x])
reduce with push
arr.reduce((acc, x) => { acc.push(x); return acc; }, [])
for...of
const acc = [] for (const x of arr) { acc.push(x); }