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flatMap vs reduce (group count) (v2)
(version: 1)
Comparing performance of:
reduce with concat vs flatMap
Created:
one year ago
by:
Guest
Go to the latest result
Script Preparation code:
var arr = Array(10).fill({items: Array(1000).fill(0)})
Tests:
reduce with concat
arr.reduce((acc, x) => acc + x.items.length)
flatMap
arr.flatMap(x => x.items).length
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
reduce with concat
flatMap
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Edg/131.0.0.0
Browser/OS:
Chrome 131 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=573811" width="100%" height="500px"></iframe>
reduce with concat
8.2M/s
flatMap
9K/s
View exact numbers
Test name
Executions per second
✓
reduce with concat
8,201,288 Ops/sec
flatMap
9,231 Ops/sec
Related benchmarks
flatMap vs reduce
flatMap vs reduce using push
flatMap vs reduce flattern array
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