Run results for: Object from array: map + Object.fromEntries vs reduce

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:132.0) Gecko/20100101 Firefox/132.0

Browser: Firefox 132

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Reduce (reuse object)

633/s

Object.fromEntries

541/s

View exact numbers

Test name	Executions per second
✓ Reduce (reuse object)	633 Ops/sec
Object.fromEntries	541 Ops/sec

Script Preparation code:

var array = Array.from({ length: 10001 }, (_, index) => index);

Tests:

Object.fromEntries
Object.fromEntries(array.map((n) => [`db/path/${n}`, null]));
Reduce (reuse object)
array.reduce((acc, n) => { acc[`db/path/${n}`] = null; return acc; }, {});