Run results for: Lodash "unionWith"

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0

Browser: Firefox 89

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
unionWith	8.6 Ops/sec
sortedUniqBy and sortBy	282.3 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);
}

Tests:

unionWith
const unionUsers1 = _.unionWith(newUsers, users, (newUser, user) => newUser.name === user.name);
sortedUniqBy and sortBy
const unionUsers2 = _.sortedUniqBy(_.sortBy([...newUsers, ...users], u => u.name), u => u.name);

Run results for: Lodash "unionWith"

unionWith

sortedUniqBy and sortBy