Run results for: SUM with forEach vs lodash.map vs map fix

Run details:

User agent: Mozilla/5.0 (iPad; CPU OS 17_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/131.0.6778.73 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 131

Operating system: iOS 17.6.1

Device Platform: Tablet

Date tested: one year ago

Benchmark engine: Benchmark.js

reduce

15.2M/s

forEach

11.2M/s

map

8.5M/s

Lodash map

4.1M/s

View exact numbers

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Tests:

reduce
let posts = [ {id: 1, upVotes: 2}, {id: 2, upVotes: 18}, {id: 3, upVotes: 1}, {id: 4, upVotes: 30}, {id: 5, upVotes: 50} ]; var sum = 0 sum = posts.reduce((s, p)=> s+=p.upVotes,0);
Lodash map
let posts = [ {id: 1, upVotes: 2}, {id: 2, upVotes: 18}, {id: 3, upVotes: 1}, {id: 4, upVotes: 30}, {id: 5, upVotes: 50} ]; var sum = 0 sum = _.map(posts, (element, i) => sum += element.upVotes)
map
let posts = [ {id: 1, upVotes: 2}, {id: 2, upVotes: 18}, {id: 3, upVotes: 1}, {id: 4, upVotes: 30}, {id: 5, upVotes: 50} ]; var sum = 0 sum = posts.map(element => { sum += element.upVotes; });
forEach
let posts = [ {id: 1, upVotes: 2}, {id: 2, upVotes: 18}, {id: 3, upVotes: 1}, {id: 4, upVotes: 30}, {id: 5, upVotes: 50} ]; var sum = 0 sum = posts.forEach(element => { sum += element.upVotes; });