Run results for: eliya and sharon :) v2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

reduce with concat

2/s

flatMap

1/s

reduce with push

1/s

View exact numbers

Script Preparation code:

var arr = Array(10_000_000).fill({entities:[1,2]})

Tests:

reduce with push
arr.reduce((acc, { entities }) => { const newE = entities.map((x) => x); acc.push(...newE); return acc; }, []);
flatMap
arr.flatMap(({ entities }) => entities.map((x) => x));
reduce with concat
arr.reduce((acc, { entities }) => { const newE = entities.map((x) => x); acc.concat(newE); return acc; }, []);