Lightweight coding agent that runs in your terminal
⑂ 19k◎ 18k
Crate
lazy_static
Macro for declaring lazily-initialized static variables in Rust.
What it is
lazy_static! declares static variables initialized on first access rather than at program start. Under the hood it uses a Once primitive. It has been superseded by once_cell::sync::Lazy and the standard library's std::sync::LazyLock, but remains widely used in existing code.
Why it is commonly used
Used for global singletons — compiled regex, connection pools, configuration — that need to be initialized once and safely shared across threads. New code prefers once_cell or std::LazyLock, but lazy_static remains common in existing Rust projects.
670
Repositories
80%
Actively maintained
530
Updated ≤ 30 days
2.1M
Total stars
597
Owners
Counted from the Cargo.toml manifests of the 670 indexed repositories that declare lazy_static as a dependency — not download counts. Dependency data last verified 2026-09-16.
Often used with
Crates that show up unusually often in lazy_static projects. The most distinctive pairings rank first — crates these projects use far more than the average indexed Rust project does, not just crates that are popular everywhere. Each percentage is the share of lazy_static projects that also use it.
serde_derive14.3%prometheus14.2%num_cpus17.9%strum_macros14.9%serde_with19.7%num-bigint11%tracing-opentelemetry13.6%opentelemetry-otlp15.4%opentelemetry_sdk16%openssl12.1%bincode21.2%opentelemetry17.2%tonic15.8%humantime12.5%tikv-jemallocator10.6%byteorder14.9%lru13.1%hyper21.9%prost20.4%derive_more13%itertools37%csv13.6%crossbeam-channel12.8%strum26.9%
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