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Run results for:
flatMap vs reduce spread vs reduce push
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<iframe src="https://measurethat.net/Embed?id=559734" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Browser:
Chrome 129
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
reduce with push
11K/s
flatMap
2K/s
reduce with spread
6/s
View exact numbers
Test name
Executions per second
✓
reduce with push
10,912 Ops/sec
flatMap
1,855 Ops/sec
reduce with spread
6 Ops/sec
Script Preparation code:
var arr = Array(10_000).fill(0)
Tests:
reduce with spread
arr.reduce((acc, x) => [...acc, x, x], [])
flatMap
arr.flatMap(x => [x, x])
reduce with push
arr.reduce((acc, x) => (acc.push(x, x), acc), [])