For fans of the Rust "safe, concurrent, practical systems language", the Rust 1.21 update is available today with some modest updates and additions.

Highlights of Rust 1.21 include:

- Documentation improvements.

- Rust now runs LLVM in parallel for code generation and should lower the peak RAM usage.

- Continued work on library stabilizations though mostly minor this cycle.

- Cargo gains support for a new [patch] section to override parts of a package's dependency graph.

- cargo install can now support installing multiple crates at once.

More details on the Rust 1.21 update via the detailed writeup at Rust-Lang.org.