Visualizing Rust's Vtables: How dyn Trait Works In Memory

The article explores how Rust's `dyn Trait` implements runtime polymorphism through virtual tables (vtables) in memory, comparing it with C++'s approaches to polymorphism like virtual functions and CRTP. It examines two key Rust dispatch mechanisms: static dispatch (using generics and monomorphization, resolved at compile time with zero runtime cost) and dynamic dispatch (using `dyn Trait` with vtables, similar to C++ virtual functions). The author aims to provide a detailed understanding of how these concepts work in memory rather than drawing direct parallels between languages.