Run results for: Object.fromEntries+map vs reduce

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36

Browser: Chrome 152

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 days ago

Benchmark engine: Benchmark.js

Reduce (reuse object)

2K/s

Map

1K/s

Reduce (creating temporary objects)

87/s

View exact numbers

Test name	Executions per second
✓ Reduce (reuse object)	2,277 Ops/sec
Map	1,445 Ops/sec
Reduce (creating temporary objects)	87 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.fromEntries(Object.entries(data).map(([k, v]) => { return [k,v]; }));