[zbentley]

Nothing in my post is about performance (of Python, Rust, or anything else).

While e.g. numpy might support your claim that Python being slow is reason to abandon it, I don’t think uv does.

My understanding is that the poor performance of pip is due to two things: a combination of slow-in-any-language solver and query/probe behavior that they’re stuck with for backwards compatibility reasons, and very poorly parallelized network and disk IO.

Parallel IO and better disk cache behavior are options because uv is a new system not tied to pip’s behavior and expectations, not because uv is a new system in rust.

Again, I think Rust is a fine choice here with some strengths in the dev-tools area, but those strengths are not (opinion, based on poking through a fair amount of uv’s code and reading Astral blog posts) the reason for uv’s success. The behavior choices that make it good are well supported in most languages.