Outdated claims

[Conaclos]

Hi!

The following claim is wrong:

For the most common pairs of values - &str and String, or &[u8] and Vec - this means that the entire enum is 4 words wide

Indeed, Rust performs niche optimizations for Vec and String.
This means that std::borow::Cow<str> has the same size as String (3 words).

[ginnyTheCat]

Yea, this is a optimization that exists between 1.65 and 1.67 and again starting from 1.76