vorner/arc-swap

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1408 stars · 52 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A Rust library providing atomic operations on Arc pointers, effectively an Atomic<Arc<T>>. It is optimized for read-mostly, write-seldom scenarios with consistent performance, similar to RwLock<Arc<T>> but lock-free for readers.

Use cases

• atomically swap shared configuration at runtime
• read shared state without locking in Rust
• replace RwLock<Arc<T>> with faster read-mostly synchronization
• hot-reload immutable data structures concurrently
• share a pointer across threads with atomic updates

When to choose

• you need lock-free reads of shared Arc data with occasional writes
• you want consistent, predictable performance for read-heavy workloads
• you need to atomically swap configuration or cached shared objects

When to avoid

• you need frequent writes with complex in-place mutation
• you can simply use RwLock or Mutex without performance concerns
• you need atomics on non-Arc types

Facets

library · maturity stable

concurrency developer-tools rust cross-platform arc atomic lock-free read-mostly shared-state algorithms

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