📦 Open Source

Async Rust's Secret: Futures That Compile to Stack Machines, Not Threads

Tokio racked up 1.2 billion downloads on crates.io in 2023. That's async Rust in the wild, powering everything from servers to embedded without blocking a single thread.

Rust async function compiling to a state machine enum diagram

⚡ Key Takeaways

  • Rust futures compile to stack-allocated state machines for true zero-cost async. 𝕏
  • Tokio's reactor-executor split crushes I/O-bound tasks on one thread. 𝕏
  • Runtime-agnostic design beats built-in approaches like Go/JS for flexibility. 𝕏
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Originally reported by dev.to

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