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Run results for:
lodash.mapKeys vs Native
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=605151" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:138.0) Gecko/20100101 Firefox/138.0
Browser:
Firefox 138
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
lodash.mapKeys
8350533.0 Ops/sec
Object.keys with for loop
14856037.0 Ops/sec
Object.entries with for loop
11485356.0 Ops/sec
Object.keys with reduce
9321431.0 Ops/sec
HTML Preparation code:
<script src="https://cdn.jsdelivr.net/lodash/4.16.0/lodash.min.js"></script>
Script Preparation code:
var value = {a: 30310, b: 100303, c: 3040494};
Tests:
lodash.mapKeys
const f = v => _.mapKeys(v, k => k + '-changed') f(value);
Object.keys with for loop
const f = v => { const m = {}; for (const k of Object.keys(v)) m[k + '-changed'] = v[k]; return m; } f(value)
Object.entries with for loop
const f = obj => { const m = {}; for (const [k, v] of Object.entries(obj)) m[k + '-changed'] = v; return m; } f(value)
Object.keys with reduce
const f = obj => Object.keys(obj).reduce( (acc, k) => ({ ...acc, [k + '-changed']: obj[k] }), {} ); f(value)