Rust: Call for testing: Cargo sparse-registry

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A new Rust blog post/announcement has been posted!

The Cargo nightly sparse-registry feature is ready for testing. The feature causes Cargo to access the crates.io index over HTTP, rather than git. It can provide a significant performance improvement, especially if the local copy of the git index is out-of-date or not yet cloned.

Overview

To try it out, add the -Z sparse-registry flag on a recent nightly build of Cargo. For example, to update dependencies:

rustup update nightly
cargo +nightly -Z sparse-registry update

The feature can also be enabled by setting the environment variable CARGO_UNSTABLE_SPARSE_REGISTRY=true. Setting this variable will have no effect on stable Cargo, making it easy to opt-in for CI jobs.

The minimum Cargo version is cargo 2022-06-17,...

Get the full details here: Call for testing: Cargo sparse-registry | Rust Blog

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