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uv installs packages faster than pip by an order of magnitude. The usual explanation is “it’s written in Rust.” That’s true, but it doesn’t explain much. Plenty of tools are written in Rust without being notably fast. The interesting question is what design decisions made the difference. Charlie Marsh’s Jane Street talk and a Xebia engineering deep-dive cover the technical details well. The intere

Using git as a database is a seductive idea. You get version history for free. Pull requests give you a review workflow. It’s distributed by design. GitHub will host it for free. Everyone already knows how to use it. Package managers keep falling for this. And it keeps not working out. Cargo The crates.io index started as a git repository. Every Cargo client cloned it. This worked fine when the re

The core problem is the lack of a lockfile. Every other package manager figured this out decades ago: you declare loose constraints in a manifest, the resolver picks specific versions, and the lockfile records exactly what was chosen. GitHub Actions has no equivalent. Every run re-resolves from your workflow file, and the results can change without any modification to your code. Research from USEN