What is the difference between message passing and direct calls?

What is the difference between message passing and direct calls?

Message passing involves sending messages between objects or processes, while direct calls involve invoking a method directly.

Can you give me an example of each?

Sure! In message passing, you might send a message to an object to request data. In direct calls, you would call a method like object.method() directly.

Which one is better for performance?

Direct calls are generally faster since they don't involve the overhead of message handling, but message passing can be more flexible.

Are there scenarios where message passing is preferred?

Yes, message passing is often preferred in distributed systems or when working with asynchronous processes.