Benchmark: Object.fromEntries vs reduce vs For-Each

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() }), {});
For-each
const res = {}; Object.entries(data).forEach((key, value) => { res[key] = value; });

Rendered benchmark preparation results:

Previous results

Test case name	Result
Object.fromEntries
Reduce (reuse object)
Reduce (creating temporary objects)
For-each

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser/OS: Chrome 133 on Mac OS X 10.15.7

Test name	Executions per second
Object.fromEntries	341.4 Ops/sec
Reduce (reuse object)	2960.0 Ops/sec
Reduce (creating temporary objects)	92.7 Ops/sec
For-each	327.9 Ops/sec

Related benchmarks:

Object.fromEntries vs reduce vs For-Each (version: 1)