Run results for: Object.fromEntries vs reduce vs Map (from Array)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:123.0) Gecko/20100101 Firefox/123.0

Browser: Firefox 123

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Reduce (reuse object)

12K/s

Object.fromEntries

5K/s

Map

2K/s

Reduce (creating temporary objects)

0/s

View exact numbers

Test name	Executions per second
✓ Reduce (reuse object)	11,739 Ops/sec
Object.fromEntries	5,216 Ops/sec
Map	2,234 Ops/sec
Reduce (creating temporary objects)	0 Ops/sec

Script Preparation code:

var data = [...Array(10000).keys()].map((elem) => ({ original: elem, edited: elem + 1 }));

Tests:

Object.fromEntries
Object.fromEntries(data.map((elem) => [elem.original, elem]));
Reduce (reuse object)
data.reduce((acc, elem) => { acc[elem.original] = elem; return acc; }, {});
Reduce (creating temporary objects)
data.reduce((acc, elem) => ({ ...acc, [elem.original]: elem }), {});
Map
data.reduce((acc, elem) => { acc.set(elem.original, elem) return acc; }, new Map());