Run results for: flat vs flatMap vs reduce vs dumb

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:103.0) Gecko/20100101 Firefox/103.0

Browser: Firefox 103

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Script Preparation code:

var arr = Array(10_000).fill(Array(20).fill(Math.random()*50))

Tests:

reduce
arr.reduce((acc, val) => acc.concat(val), [])
flatMap
arr.flatMap(x => x)
flat
arr.flat()
dumb
arr.reduce((acc, val) => { if (val) { val.forEach((x) => acc.push(x)); } return acc; }, [])