Rust Concurrency

The shape of the workload picks the model. This skill owns that pick for threads, and it stops where task concurrency begins — runtime, executors, spawn_blocking, and cancellation live in /async-rust.

The shape picks the model

• The same operation over many independent items: data parallelism, rayon.
• Independent units of work that are mostly waiting: task concurrency, /async-rust, not here.
• State several threads read and write: shared state — the one to reach for last, because it is the only one of the three that can deadlock.

Data parallelism