Rust 1.80, the most recent model of the fashionable memory-safe programming language, has been launched, that includes “lazy” sorts to delay initialization of knowledge till their first entry.
Rust 1.80 was unveiled on July 25. Builders with a earlier model of Rust put in by way of rustup can replace to model 1.80 by working $ rustup replace steady.
The brand new lazy sorts LazyCell and LazyLock, which delay initialization of values till first entry, are just like the OnceCell and OnceLock sorts stabilized in Rust 1.70, however with the initialization operate included within the cell. This completes the stabilization of performance adopted into the usual library from lazy_static and once_cell crates. LazyLock is the thread-safe choice, appropriate for locations like static values. LazyCell lacks thread synchronization, so doesn’t implement Sync, which is required for static, however can nonetheless be utilized in thread_local! statics, the Rust group stated.
