Scope: criterion bench measuring lock/unlock on a single thread and (separately) under contention from 2–N threads. No regression gate initially — just collect a baseline for CodSpeed.
Acceptance: benches exist and run under cargo bench.
kspin::Mutex uncontended/contended paths
#19
Scope: criterion bench measuring lock/unlock on a single thread and (separately) under contention from 2–N threads. No regression gate initially — just collect a baseline for CodSpeed.
Acceptance: benches exist and run under cargo bench.