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Run results for:
flatMap vs reduce
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.1.1 Safari/605.1.15
Browser:
Safari 18
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
flatMap
16K/s
reduce with concat
10/s
View exact numbers
Test name
Executions per second
✓
flatMap
15,990 Ops/sec
reduce with concat
10 Ops/sec
Script Preparation code:
var arr = Array(10_000).fill(0)
Tests:
reduce with concat
arr.reduce((acc, x) => [...acc, x, x], [])
flatMap
arr.flatMap(x => [x, x])