threadshare: use bench to select appropriate Mutexes
Depending on the contention model and sync / async usage, several locking mechanisms are available:
-
std::sync::Mutex. -
std::sync::RwLock. -
futures::lock::Mutex. parking_lot:*-
simple-mutex.
We should use benches to select the most efficient candidate.
Note that smol might be used as a basis for the executor and can lead to different results.
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