Run results for: Object.fromEntries vs create temp object

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

creating temporary objects

14K/s

Object.fromEntries

2K/s

View exact numbers

Test name	Executions per second
✓ creating temporary objects	14,254 Ops/sec
Object.fromEntries	1,714 Ops/sec

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);