Run results for: uniqWith vs uniqBy vs ES6 Set (isEqual)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser: Chrome 103

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
uniqWith	57.5 Ops/sec
uniqBy	2808.8 Ops/sec
ES6 Set	5494.9 Ops/sec

HTML Preparation code:

<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js'></script>

Script Preparation code:

var users = [
  { 'name': 'barney',  'age': 36 },
  { 'name': 'pebbles', 'age': 5 }
];

var newUsers = [
  { 'name': 'fred',    'age': 40 },
  { 'name': 'barney',  'age': 36 },
  { 'name': 'pebbles', 'age': 2 }
];

for(let i = 0; i < 2000; i++) {
  var newUser = { 'name': 'user_' + i, 'age': Math.floor(Math.random() * i) };
  newUsers.push(newUser);
}

function isEqual(val1, val2) {
  return val1.name === val2.name;
}

function uniques(arr) { 
    const trackingSet = new Set();
    return arr.map(function (obj) { 
        if(!trackingSet.has(obj.name)) {
           trackingSet.add(obj.name)
           return obj;
        } 
    });
}

Tests:

uniqWith
const unionUsers1 = _.uniqWith(newUsers.concat(users), isEqual);
uniqBy
const unionUsers2 = _.uniqBy(newUsers.concat(users), 'name');
ES6 Set
const unionUsers3 = uniques(newUsers.concat(users));