Benchmark: Object.fromEntries+map vs reduce

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]; }));

Rendered benchmark preparation results:

Previous results

Test case name	Result
Reduce (reuse object)
Reduce (creating temporary objects)
Map

Latest run results:

Run details: (Test run date: 12 hours ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/153.0.0.0 Safari/537.36

Browser/OS: Chrome 153 on Mac OS X 10.15.7

Reduce (reuse object)

4K/s

Map

2K/s

Reduce (creating temporary objects)

182/s

View exact numbers

Test name	Executions per second
✓ Reduce (reuse object)	3,512 Ops/sec
Map	2,148 Ops/sec
Reduce (creating temporary objects)	182 Ops/sec

Object.fromEntries+map vs reduce (version: 1) Benchmark.js