Run results for: Reduce: filter-map vs push vs spread

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.128 Safari/537.36

Browser: Chrome 89

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Script Preparation code:

var length = 10000
var fillArray = new Array(length).fill(0).map((e, i) => i)

Tests:

filter-map
fillArray.filter(e => (e & 1) === 1).map(e => e+1)
push
fillArray.reduce((p, e) => { if (e & 1 === 1) p.push(e+1); return p; }, []);
reduce
fillArray.reduce((p, e) => { if (e & 1 === 1) return [...p, e]; return p; }, []);