Run results for: Object.fromEntries vs reduce vs Map edited

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36

Browser: Chrome 146

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 4 months ago

Reduce (reuse object)

2K/s

Map

938/s

Reduce (creating temporary objects)

96/s

View exact numbers

Test name	Executions per second
✓ Reduce (reuse object)	2,023 Ops/sec
Map	938 Ops/sec
Reduce (creating temporary objects)	96 Ops/sec

Script Preparation code:

var data = { ...Array.from(Array(10000).keys()) };

Tests:

Reduce (reuse object)
Object.entries(data).reduce((acc, [k, v]) => { acc[k] = v.toString(); return acc; }, {});
Reduce (creating temporary objects)
Object.entries(data).reduce((acc, [k, v]) => { return {...acc, [k]: v.toString()} }, {});
Map
Object.entries(data).reduce((acc, [k, v]) => { acc.set(k, v.toString()) return acc; }, new Map());