Run results for: Lodash "unionBy" test

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:123.0) Gecko/20100101 Firefox/123.0

Browser: Firefox 123

Operating system: Windows

Device Platform: Desktop

Date tested: 8 months ago

Test name	Executions per second
unionBy	1427.5 Ops/sec
test	2736.1 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 },
];

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);
  users.push(newUser)
}

Tests:

unionBy
const unionUsers2 = _.unionBy(newUsers, users, 'name'); console.log('ub', unionUsers2.length)
test
let obj = {} users.forEach((user) => obj[user.name] = user) newUsers.forEach((user) => obj[user.name] = user) console.log('test', Object.values(obj).length)