Run results for: Lodash "uniqWith" "uniqBy" "unionWith" "unionBy"

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.63 Safari/537.36

Browser: Chrome 102

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
uniqWith	0.8 Ops/sec
uniqBy	4624.6 Ops/sec
UnionWith	0.8 Ops/sec
unionBy	3942.8 Ops/sec

HTML Preparation code:

<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.21/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:

uniqWith
const unionUsers1 = _.uniqWith(newUsers.concat(users), _.isEqual);
uniqBy
const unionUsers2 = _.uniqBy(newUsers.concat(users), 'name');
UnionWith
const unionUsers3 = _.unionWith(newUsers, users, _.isEqual);
unionBy
const unionUsers4 = _.unionBy(newUsers, users, 'name');

Run results for: Lodash "uniqWith" "uniqBy" "unionWith" "unionBy"

uniqWith

uniqBy

UnionWith

unionBy