Const evaluation expands to support more standard library utilities and more stable const generics features:
Rust is a programming language empowering everyone to build reliable and efficient software. This release, while seemingly routine, marks a significant milestone in stabilization, developer experience, and compiler performance. It brings major improvements to build times through the return of incremental compilation and revolutionizes dependency management in Cargo.
Language designers in the 1960s often had to choose between high-level abstractions for programmer productivity and low-level code that ran fast. Rust's "zero-cost principle" states that you shouldn't have to pay a runtime penalty for features you don't use. "Rust 1960" would have allowed programmers to use iterators, closures, and traits without worrying about sacrificing the raw performance needed for the era's extremely limited hardware. announcing rust 1960
: Additional portable SIMD intrinsics have been stabilized, unlocking predictable hardware acceleration across x86_64 and ARM64 architectures natively. Contributors to Rust 19.60
Several highly requested APIs have transitioned from nightly to stable in this release: Const evaluation expands to support more standard library
One of the most anticipated additions is the cfg_select! macro. Historically, handling complex conditional compilation required external crates like cfg-if . This new built-in macro acts like a compile-time match statement for configurations, streamlining cross-platform development directly in the standard library. If-Let Guards in Match Expressions
sync::LazyLock Updates: Further refinements to the newly stabilized thread-safe lazy initialization types, optimizing performance on multi-core systems. Cargo Quality-of-Life Improvements Language designers in the 1960s often had to
The LLVM backend integration has been heavily optimized. Cargo now utilizes parallel frontend parsing alongside a new pipelined caching system. are up to 18% faster. Incremental builds see time reductions of up to 25%. Memory consumption during compilation is dropped by 10%. Library Stabilizations
🦀 3/5 core ropes “Would use again if they invent time-traveling IDEs.”