Run results for: Object.fromEntries vs reduce vs classic for2

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:146.0) Gecko/20100101 Firefox/146.0

Browser: Firefox 146

Operating system: Linux

Device Platform: Desktop

Date tested: 6 months ago

Object.fromEntries

6K/s

For

959/s

Reduce (reuse object)

939/s

View exact numbers

Script Preparation code:

const data = Array.from(Array(10000).keys());

Tests:

Object.fromEntries
data.map((idx) => [`id-${idx}`, idx]);
Reduce (reuse object)
data.reduce((acc, idx) => { acc[`id-${idx}`] = idx; return acc; }, {});
For
const a = {} for (let idx of data) { a[`id-${idx}`] = idx; }