BirdNest Tech Talk

Jul 26, 2024 · Fundamentals

How to Choose Between Rust’s LazyLock, LazyCell, OnceLock, and OnceCell

Rust 1.80 introduces LazyCell and LazyLock, synchronized lazy-initialization primitives that differ from OnceCell and OnceLock in thread safety and built‑in initialization, and this article explains their characteristics, trade‑offs, and provides concrete code examples to help developers select the appropriate type for their use case.