3 ms·

Actually, the parking_lot mutex is fair: https://docs.rs/parking_lot/0.10.0/parking_lot/type.Mutex.html#fairness https://docs.rs/parking_lot/0.10.0/parking_lot/

Actually, the parking_lot mutex is fair: https://docs.rs/parking_lot/0.10.0/parking_lot/type.Mutex.html#fairness https://docs.rs/parking_lot/0.10.0/parking_lot/type.Mutex.ht... The high waiting variance is because the benchmark randomly decides which locks to take, meaning that the amount of contention is variable.

sanxiyn 7y ago
Note that fair locking is still expensive. parking_lot achieves both speed and fairness by starting with unfair locking and falling back to fair locking.
matklad 7y ago
Benchmark uses fixed seeds, there’s no inherent randomness.