Run results for: Object creation: reduce vs. for

Run details:

User agent: Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36

Browser: Chrome 90

Operating system: Fedora

Device Platform: Desktop

Date tested: 3 years ago

Script Preparation code:

var a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

Tests:

reduce
return a.reduce((acc, item) => { acc[item] = undefined; return acc; }, {});
for loop
const out = {}; for(let i = 0; i < a.length; i++) { out[a[i]] = undefined; } return out;
forEach loop
const out = {}; a.forEach((key) => { out[key] = undefined; }) return out;