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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36

Browser: Chrome 88

Operating system: Mac OS X 11.2.1

Device Platform: Desktop

Date tested: 4 years ago

Script Preparation code:

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

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

Tests:

Object.fromEntries
Object.fromEntries(Object.entries(data).map((key, value) => [key, value]));
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; }, {});
Object.entries(data).reduce((acc, [k, v]) => {
acc[k] = v.toString();
return acc;
}, {});
Map + Array.from
Array.from(new Map(Object.entries(data).map((key, value) => [key, value])))
Array.from(new Map(Object.entries(data).map((key, value) => [key, value])))