What is the difference between event bus and pub/sub?

What is the difference between event bus and pub/sub?

An event bus is a communication system that allows different components to communicate with each other by sending events. Pub/sub, or publish/subscribe, is a messaging pattern where senders (publishers) send messages without knowing who will receive them (subscribers).

Can you give me an example of when to use each?

Sure! Use an event bus for internal communication within a single application, like notifying different modules. Use pub/sub for distributed systems where components may be on different servers, like in microservices.

Are there any performance differences between the two?

Yes, event buses can be more efficient for local communication, while pub/sub systems may introduce latency due to network communication. However, pub/sub can scale better for larger systems.

Which one is easier to implement?

Event buses are generally simpler to implement for smaller applications, while pub/sub systems can be more complex due to their distributed nature.