Run results for: Map reduce vs sumBy

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.128 Safari/537.36

Browser: Chrome 89

Operating system: Mac OS X 10.15.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Native	10486937.0 Ops/sec
Lodash	3640916.8 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

AخA
 
<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

var arr = [{ a: 1 }, { a: 5 }, { a: 11 }, { a: 55 }];

 
var arr = [{ a: 1 }, { a: 5 }, { a: 11 }, { a: 55 }];

Tests:

const total = arr.map(x => x.a).reduce((prev,curr) => prev + curr, 0);

 
const total = arr.map(x => x.a).reduce((prev,curr) => prev + curr, 0);

Lodash
const total = _.sumBy(arr, x => x.a);
const total = _.sumBy(arr, x => x.a);