Run results for: Object.fromEntries vs reduce vs Map

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/60.5 Safari/605.1.15

Browser: Safari 60

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 11 months ago

Test name	Executions per second
Object.fromEntries	194.9 Ops/sec
Reduce (reuse object)	378.3 Ops/sec
Reduce (creating temporary objects)	0.1 Ops/sec
Map	351.6 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() }), {});
Map
Object.entries(data).reduce((acc, [k, v]) => { acc.set(k, v.toString()) return acc; }, new Map());