Benchmark: Object.fromEntries vs reduce vs Map/reduce vs new Map

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 (reduce)
Object.entries(data).reduce((acc, [k, v]) => { acc.set(k, v.toString()) return acc; }, new Map());
Map (constructor)
new Map(Object.entries(data))

Rendered benchmark preparation results:

Previous results

Test case name	Result
Object.fromEntries
Reduce (reuse object)
Reduce (creating temporary objects)
Map (reduce)
Map (constructor)

ⓘ Get performance results from real users on your website with Request Metrics.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Browser/OS: Chrome 111 on Windows

Test name	Executions per second
Object.fromEntries	93.4 Ops/sec
Reduce (reuse object)	1057.0 Ops/sec
Reduce (creating temporary objects)	22.9 Ops/sec
Map (reduce)	678.9 Ops/sec
Map (constructor)	811.3 Ops/sec

Object.fromEntries vs reduce vs Map/reduce vs new Map (version: 0)