What are the best practices for using defer in Go?

What are the best practices for using defer in Go?

Using defer in Go is great for resource management. Best practices include deferring close statements for files and network connections.

Can you give an example of when to use defer?

Sure! If you open a file, you can defer the file.Close() call to ensure it closes when the function exits, even if an error occurs.

Are there any performance considerations with defer?

Yes, deferring a function call does add a slight overhead. It's best to use it for cleanup tasks rather than in performance-critical loops.

What about using defer in a loop?

Avoid using defer in loops for resource-intensive operations. Instead, manage resources explicitly to prevent excessive overhead.

Can defer be used with recovery?

Absolutely! You can use defer to recover from panics by deferring a function that calls recover(). This helps maintain control over error handling.