How to use the lazy initialization pattern with Rust 1.80

Lazy initialization in Rust defers the initialization of resources until they are needed, improving startup times and reducing unnecessary overhead. Traditionally, Rust did not support lazy initialization natively, leading developers to rely on external crates like `lazy_static` and `once_cell` for this functionality. However, with the release of Rust 1.80, the standard library now includes types such as `OnceLock` and `LazyLock` that offer similar capabilities without requiring additional dependencies. These native types are advantageous as they eliminate the need for extra crates and are maintained by the Rust standard library team, though popular crates like `lazy_static` and `once_cell` remain widely used and well-supported. The article highlights that the integration of lazy initialization into Rust's standard library simplifies the process of managing resource-intensive operations, allowing developers to perform expensive calculations only when necessary, and notes that while many existing projects may continue to use the older crates, new projects are likely to adopt the native approach.