memory
The Most Horribly Unsafe Thing You Can Do in Rust
mem::transmute reinterprets raw bytes across types with almost no checks. Here’s why it’s more dangerous than raw pointers, and the layout traps that make it worse.
Variance and PhantomData in Rust
How Rust’s variance system works, why std:🧵:Scope needs invariant lifetimes, and what PhantomData actually does to prevent use-after-free.
Rust Memory Layout Under the Hood
A visual guide to how Rust lays out structs, Vec, String, smart pointers, and trait objects in memory — alignment rules, field reordering, and the byte-level details that shape your program’s performance.