What are the differences between the Event Emitter and Observer patterns?

What are the differences between the Event Emitter and Observer patterns?

The Event Emitter pattern allows objects to emit events that other objects can listen to, while the Observer pattern involves a subject notifying its observers about changes.

Can you give me an example of each pattern?

Sure! In the Event Emitter pattern, a button click can emit an event that multiple listeners respond to. In the Observer pattern, a weather station (subject) notifies various display units (observers) when the temperature changes.

Which pattern is better for real-time applications?

The Event Emitter pattern is often preferred for real-time applications due to its asynchronous nature and ability to handle multiple listeners efficiently.

Are there any performance considerations I should be aware of?

Yes, with the Event Emitter pattern, too many listeners can lead to performance issues. It's important to manage listeners properly to avoid memory leaks.