Run results for: Object.fromEntries vs reduce vs reduce with spread

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36

Browser: Chrome 91

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Script Preparation code:

var arr = Array.from({ length: 100000 }).map((_, index) => index);

Tests:

Object.fromEntries
Object.fromEntries(arr.map(i => [i, i*2]))
reduce
arr.reduce((acc, curr) => { acc[curr] = curr * 2; return acc }, {})
reduce with spread
arr.reduce((acc, curr) => { return { ...acc, [curr]: curr * 2, } }, {})