async-rust-internals

Explains and debugs Rust async internals — the Future poll and waker contract, why async-generated futures are !Unpin and what Pin guarantees, hand-writing a Future, choosing between tokio spawn, spawn_blocking, yield_now and spawn_local, auditing blocking work that stalls a runtime, inspecting tasks with tokio-console, and cancellation-safe select!, biased select and join! usage with fused futures. Use when the user asks how await, poll, wakers, Pin, Unpin, select! or join! behave, or reports async tasks that hang, stall, spin or leak memory. Not for Rust questions with no async component, concurrency in other languages, debugger sessions or flamegraph profiling.

Version

v1.0.0

Size

21 KB

Updated

2026-10-12

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