Run results for: Lodash difference vs Set

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:140.0) Gecko/20100101 Firefox/140.0

Browser: Firefox 140

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Lodash

5.0M/s

Set

3.0M/s

View exact numbers

Test name	Executions per second
✓ Lodash	5,024,505 Ops/sec
Set	2,964,896 Ops/sec

HTML Preparation code:

	<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js"></script>

Script Preparation code:

const currentSubscriberIds = ['user1', 'user2', 'user3', 'user4', 'user5'];
const newSubscriberIds = ['user3', 'user4', 'user5', 'user6', 'user7'];

Tests:

Lodash
const subscribersToAdd = _.difference(newSubscriberIds, currentSubscriberIds); const subscribersToRemove = _.difference(currentSubscriberIds, newSubscriberIds);
Set
const currentSubscribersSet = new Set(currentSubscriberIds); const newSubscribersSet = new Set(newSubscriberIds); const subscribersToAddSet = [...new Set(newSubscriberIds)] .filter(id => !currentSubscribersSet.has(id)); // ['user6', 'user7'] const subscribersToRemoveSet = [...currentSubscribersSet] .filter(id => !newSubscribersSet.has(id)); // ['user1', 'user2']