Benchmark: lodash.mapKeys vs Iterating over properties in for of loop in function

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);
native
const f = v => { const m = {}; for (const k of Object.keys(value)) m[k + '-changed'] = value[k]; return m; } f(value)

Rendered benchmark preparation results:

Previous results

Test case name	Result
lodash.mapKeys
native

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.183 Safari/537.36

Browser/OS: Chrome 86 on Mac OS X 10.14.6

Test name	Executions per second
lodash.mapKeys	1031054.0 Ops/sec
native	1223894.0 Ops/sec

lodash.mapKeys vs Iterating over properties in for of loop in function (version: 0)