Run results for: Object.fromEntries vs create temp object vs Array.reduce

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser: Chrome 125

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

creating temporary objects

22K/s

Array.reduce

21K/s

Object.fromEntries

3K/s

View exact numbers

Script Preparation code:

var array = Array.from(Array(10000).keys())

Tests:

Object.fromEntries
Object.fromEntries(array.map(value => [value, value]));
creating temporary objects
const data = {}; array.forEach(value => data[value] = value);
Array.reduce
array.reduce((obj, item) => { obj[item] = item; return obj; }, {});