How do interfaces affect performance in Go?

How do interfaces affect performance in Go?

Interfaces in Go provide a way to define behavior without specifying the underlying type, but they can introduce some overhead.

What kind of overhead are we talking about?

The overhead mainly comes from dynamic dispatch, which can be slower than direct method calls. However, it's often negligible.

Are there any best practices to minimize this overhead?

Yes, you can minimize overhead by using concrete types when performance is critical and limiting the use of interfaces.

Can you give an example of when to use interfaces?

Use interfaces when you need flexibility and polymorphism, like in dependency injection or when working with multiple types.