What are the best practices for using context in Golang?

What are the best practices for using context in Golang?

In Golang, it's important to use context for managing deadlines, cancellations, and passing request-scoped values. Always create a new context using context.Background() or context.TODO() as a base.

When should I use context.Background() vs context.TODO()?

Use context.Background() when you need a top-level context, typically in main functions or tests. Use context.TODO() when you're unsure which context to use or when you're in the process of refactoring.

Can you give an example of passing values in context?

Sure! You can use context.WithValue() to pass values. For example: ctx := context.WithValue(parentCtx, key, value) where key is a type-safe identifier.

What are common mistakes to avoid with context?

Common mistakes include using context for passing optional parameters, not canceling contexts, and creating contexts in tight loops.