Benchmark: 20240726 - flatMap vs filter/map

Script Preparation code:

var arr = Array.from({ length: 1000 }).map((_, i) => i)

Tests:

flatMap
const res = arr.flatMap((n) => { if (n % 2 === 0) return [] return [n * 3] })
.map.filter
const res = arr .filter((n) => n % 2 !== 0) .map((n) => n * 3)

Rendered benchmark preparation results:

Previous results

Test case name	Result
flatMap
.map.filter

ⓘ Get performance results from real users on your website with Request Metrics.

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Browser/OS: Chrome 127 on Mac OS X 10.15.7

Test name	Executions per second
flatMap	91013.8 Ops/sec
.map.filter	365636.3 Ops/sec

20240726 - flatMap vs filter/map (version: 0)