TL;DR
CacheKit is an open-source Rust library that implements high-performance cache replacement policies (FIFO, LRU, LRU-K) and provides primitives for building tiered caches, with optional metrics and benchmarks. The project is hosted on GitHub under the OxidizeLabs organization and includes documentation, examples and an alpha release.
What happened
OxidizeLabs published CacheKit, a Rust crate designed to offer performant cache replacement policies and composable tiered caching primitives for systems where caching behavior must be tightly controlled. The repository implements policies such as FIFO, LRU and LRU-K, provides backends for in-memory and composite strategies, and includes optional hooks for metrics collection and benchmark harnesses to evaluate policy behavior under workloads. The codebase aims for an idiomatic Rust API and notes no_std compatibility where applicable. Documentation files cover design, policy surveys, data structures, release processes and CI/CD. An example in the README shows creating an LRUK cache, inserting an item and retrieving it. The project is available via a Git dependency URL, is licensed under Apache-2.0 and MIT, and the repository lists an alpha release (v0.1.0-alpha) and two contributors.
Why it matters
- Provides low-level control over cache behavior for performance-critical systems and microservices.
- Includes tiered caching primitives to compose layered strategies rather than relying on a single policy.
- Optional metrics and benchmark harnesses help teams evaluate policy trade-offs under realistic workloads.
- Designed with performance and predictability in mind and mentions compatibility with no_std environments.
Key facts
- Implements cache replacement policies including FIFO, LRU and LRU-K.
- Offers tiered caching primitives and backends for in-memory and composite strategies.
- Optional integration points for metrics collectors (examples include Prometheus/metrics crates).
- Includes benchmarks and a harness to compare policy performance under workloads.
- Documentation covers architecture, policy survey, data structures, release and CI/CD procedures.
- Example usage shows LRUKCache with basic insert/get operations.
- Repository is hosted at github.com/OxidizeLabs/cachekit and can be added as a Cargo git dependency.
- Licensed under both Apache-2.0 and MIT.
- Repository shows one alpha release (v0.1.0-alpha), two contributors and five stars.
What to watch next
- Whether the project will be published to crates.io for easier consumption — not confirmed in the source
- Progress on additional policies and roadmap items listed in docs/policies/README.md — not confirmed in the source
- Plans for a stable release series beyond the v0.1.0-alpha release and broader adoption in production — not confirmed in the source
Quick glossary
- LRU (Least Recently Used): A cache eviction policy that removes the item that has not been accessed for the longest time.
- FIFO (First In, First Out): A simple cache eviction policy that evicts items in the order they were inserted.
- LRU-K: A variant of LRU that considers the K-th most recent access to an item, used to improve hit-rate decisions.
- Tiered caching: A layered approach to caching that composes multiple cache levels or strategies to balance speed, size and cost.
- no_std: A Rust compilation mode that avoids the standard library, useful for constrained or embedded environments.
Reader FAQ
Which cache policies does CacheKit implement?
The repository lists FIFO, LRU and LRU-K among implemented policies.
How do I add CacheKit to my project?
The README shows adding cachekit as a git dependency in Cargo.toml: cachekit = { git = "https://github.com/OxidizeLabs/cachekit" }.
Is CacheKit published on crates.io?
not confirmed in the source
What license covers the project?
The codebase is available under both Apache-2.0 and MIT licenses.
Who maintains CacheKit?
The GitHub repository is under the OxidizeLabs organization; the listed contributors include Thomas Korrison (TKorr) and dependabot[bot].
cachekit High-performance cache policies and tiered caching primitives for Rust systems with optional metrics and benchmarks. Overview CacheKit is a Rust library that provides: High-performance cache replacement policies (e.g., FIFO,…
Sources
- Show HN: Cachekit – High performance caching policies library in Rust
- cache-kit – crates.io: Rust Package Registry
- multi_tier_cache – Rust
- Caching — list of Rust libraries/crates …
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