AapoAlas · Dec 2

Bytes 1..=3 are uninitialised padding bytes, and cannot be read even through raw pointers.

Bjorn · Dec 2

I guess this code is about proving a point? As I don’t see the advantage the code in new() nor eq(). In the real world, would these actually be faster in any way?

Conrad Ludgate · Dec 2

Two things look sus to me. `(*ptr).cache_hit = false` is constructing a `&mut bool` to an uninit place. I usually use `(&raw mut (*ptr).cache_hit).write(false)` The second is that your equality check is reading uninit bytes, because padding bytes are always uninit