Run results for: josh's Object.fromEntries vs reduce vs map

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser: Chrome 122

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Reduce (reuse object)

539/s

Put it in a Map

197/s

Object.fromEntries

60/s

Reduce (creating temporary objects)

20/s

View exact numbers

Test name	Executions per second
✓ Reduce (reuse object)	539 Ops/sec
Put it in a Map	197 Ops/sec
Object.fromEntries	60 Ops/sec
Reduce (creating temporary objects)	20 Ops/sec

Script Preparation code:

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

Tests:

Object.fromEntries
Object.fromEntries(Object.entries(data).map((key, value) => [key, value]));
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]) => ({ ...acc, [k]: v.toString() }), {});
Put it in a Map
Object.fromEntries(new Map(Object.entries(data)))