Benchmark: Diferentes tipos de flatmap - MeasureThat.net

Script Preparation code:

var arr = Array(10_000).fill(0)

Tests:

Reduce
arr.reduce((acc, x) => [...acc, x, x], [])
flatMap
arr.flatMap(x => [x, x])
Reduce push
arr.reduce((acc, x) => (acc.push(x, x),acc), [])
Reduce prealloc
arr.reduce((acc, x) => (acc.push(x, x),acc), Array(20_000))
Concat Apply
[].concat.apply([], [arr,arr])

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Reduce
flatMap
Reduce push
Reduce prealloc
Concat Apply

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36

Browser/OS: Chrome 108 on Linux

View result in a separate tab

Test name	Executions per second
Reduce	7.6 Ops/sec
flatMap	243.4 Ops/sec
Reduce push	10619.3 Ops/sec
Reduce prealloc	3730.0 Ops/sec
Concat Apply	100625.1 Ops/sec