What is the difference between Go's compile-time and run-time reflection in Go?

Go has both compile-time and run-time reflection mechanisms for working with the type information of objects.

Compile-time reflection is used to generate code or modify code based on the type information of objects at compile-time. It is typically used in code generation tools and meta-programming frameworks.

On the other hand, run-time reflection is used to inspect and manipulate the type information of objects at run-time. Go's reflection package provides a set of functions and types for working with the type information of objects at run-time. It allows the developer to query the type of an object, examine and modify its fields and methods, and create new instances of the object.

While compile-time reflection is typically more efficient and can provide better performance, it is also more rigid and less flexible. Run-time reflection, on the other hand, is more dynamic and flexible, but can be slower due to the overhead of reflection operations.

In general, it is recommended to use run-time reflection only when necessary, and to prefer static typing and compile-time techniques whenever possible.