Run results for: Object mapping

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.0

Browser: Chrome 120

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

R.mapObjIndexed

3K/s

Reduce (reuse object)

2K/s

Object.fromEntries

187/s

View exact numbers

HTML Preparation code:

<script src="//cdn.jsdelivr.net/npm/ramda@latest/dist/ramda.min.js"></script>

Script Preparation code:

var data = { ...Array.from(Array(10000).keys()) };

Tests:

Object.fromEntries
const x = Object.fromEntries(Object.entries(data).map((key, value) => [key, value*2])); console.log(x)
Reduce (reuse object)
const x = Object.entries(data).reduce((acc, [k, v]) => { acc[k] = v*2 return acc; }, {}); console.log(x)
R.mapObjIndexed
const x = R.mapObjIndexed((value, key) => value * 2, data) console.log(x)