rust-zero-cost

Zero-cost abstraction in Rust means using high-level constructs like generics without adding runtime overhead. Monomorphization generates specific code for each generic type at compile time, replacing dynamic dispatch with static, efficient machine code.

Use static dispatch with `impl Trait` for compile-time polymorphism and maximum speed. Choose `dyn Trait` trait objects when dynamic dispatch is needed, accepting vtable lookup overhead for flexibility in heterogeneous collections.

Avoid unnecessary allocations by leveraging Rust's ownership model and zero-cost abstractions. Use compile-time generics and static dispatch to prevent hidden vtable lookups and heap allocations in performance-critical loops.

Yes, optimizing high-throughput web server components requires a solid understanding of Rust's type system and memory management. This knowledge is essential to effectively apply generics, traits, and monomorphization for minimal runtime overhead.

Using `dyn Trait` introduces runtime overhead because it relies on dynamic dispatch via vtable lookups to determine the correct method implementation. Generics avoid this by resolving types at compile time through monomorphization.

Avoid dynamic dispatch in performance-critical code paths where vtable lookups create measurable overhead. If data processing abstractions must not introduce runtime penalties, favor compile-time polymorphism using generics and static dispatch.