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A hands-on tutorial series that bridges the gap between understanding async Rust internals (Future, poll, Pin, executor) and shipping real async code with Tokio, aimed at developers familiar with JavaScript async and basic Rust.
This article analyzes unexpected memory allocation costs in Tokio's mpsc channels in Rust, revealing a fixed overhead per channel due to internal block sizing. It demonstrates how this impacts large-scale applications like Agent Gateway and suggests alternatives like futures-channel for memory efficiency.