Run results for: Unique and max item from array: Object.values + reduce OR lodash orderBy + uniqBy

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36

Browser: Chrome 105

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Object.values + reduce	2043519.0 Ops/sec
Lodash orderBy + uniqBy	455687.0 Ops/sec
Lodash map + groupBy + maxBy	642501.5 Ops/sec

HTML Preparation code:

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

Script Preparation code:

var test = [{
    id: 'a1',
    value: 20
}, {
    id: 'a2',
    value: 15
}, {
    id: 'a3',
    value: 40
}, {
    id: 'a1',
    value: 99
}, {
    id: 'a2',
    value: 30
}]

Tests:

Object.values + reduce
var result = Object.values(test.reduce((acc, curr) => { if (!acc[curr.id] || acc.value < curr.value) { acc[curr.id] = curr } return acc }, {}))
Lodash orderBy + uniqBy
var result = _(test).orderBy(['id', 'value'], ['asc', 'desc']).uniqBy('id').value()
Lodash map + groupBy + maxBy
var result = _.map(_.groupBy(test, 'id'), g => _.maxBy(g, 'value'))

Run results for: Unique and max item from array: Object.values + reduce OR lodash orderBy + uniqBy

Remove duplicated items by id from list maintaining the biggest value

Object.values + reduce

Lodash orderBy + uniqBy

Lodash map + groupBy + maxBy