Benchmark: flatMap() vs filter().map() vs reduce() push vs reduce() spread

Script Preparation code:

var arr = [];
var i = 0;

while (i <= 1E5) arr[i] = i++;

var short = arr.filter(x => x <= 1e4);

Tests:

filter().map()
arr.filter(x => x % 12).filter(x => x % 5).filter(x => x % 3).map(x => x/100)
flatMap()
arr.flatMap(x => x % 12 && x % 5 && x % 3 ? x/100 : [])
reduce() push
arr.reduce((newArray, x) => { if (x % 12 && x % 5 && x % 3) { newArray.push(x / 100) } return newArray }, [])
reduce() spread
short.reduce((newArray, x) => { if (x % 12 && x % 5 && x % 3) { return [...newArray, x / 100] } return newArray }, [])

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
filter().map()
flatMap()
reduce() push
reduce() spread

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/135.0.0.0 Safari/537.36

Browser/OS: Chrome 135 on Windows

View result in a separate tab

reduce() push

598/s

flatMap()

581/s

filter().map()

269/s

reduce() spread

44/s

View exact numbers

Test name	Executions per second
✓ reduce() push	598 Ops/sec
flatMap()	581 Ops/sec
filter().map()	269 Ops/sec
reduce() spread	44 Ops/sec

flatMap() vs filter().map() vs reduce() push vs reduce() spread (version: 1)

flatMap vs filter map vs reduce()

Comparing performance of: `filter().map() vs flatMap() vs reduce() push vs reduce() spread`

Created: one year ago by: Guest

Go to the latest result

filter().map()

flatMap()

reduce() push

reduce() spread

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

flatMap() vs filter().map() vs reduce() push vs reduce() spread (version: 1)

flatMap vs filter map vs reduce()

Comparing performance of: filter().map() vs flatMap() vs reduce() push vs reduce() spread

Created: one year ago by: Guest

Go to the latest result

filter().map()

flatMap()

reduce() push

reduce() spread

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `filter().map() vs flatMap() vs reduce() push vs reduce() spread`