🔑 KeyPaths in Rust
Key paths provide a safe, composable way to access and modify nested data in Rust. Inspired by KeyPath and Functional Lenses system, this feature rich crate lets you work with struct fields and enum variants as first-class values.
| Operation | Keypath | Direct Locks | Overhead |
|---|---|---|---|
| Read | ~241 ns | ~117 ns | ~2.1x |
| Write | ~239 ns | ~114 ns | ~2.1x |
The keypath approach builds the chain each iteration and traverses through LockKp.then().then().then_async().then(); direct locks use sync_mutex.lock() then tokio_mutex.lock().await. The keypath overhead reflects chain construction plus composed traversal vs. manual lock nesting. Hot-path functions are annotated with #[inline] for improved performance.
📜 License
- Mozilla Public License 2.0