199. Static Dispatch — Generics Beat Box When You Can Afford the Code

Sat, 13 Jun 2026 09:00:00 +0100

Box<dyn Trait> is the reflex when a function “takes something that implements a trait.” But every call through it pays for a vtable hop the compiler can’t see past. Swap it for a generic and the optimizer inlines the whole thing.

Dispatch on rustbites

199. Static Dispatch — Generics Beat Box When You Can Afford the Code