The Embedded Rust Runtime Dilemma: When Standard Tools Fail on Raspberry Pi

Developers building Rust services for resource-constrained embedded systems often assume mainstream async runtimes like Tokio will simply work everywhere—but memory constraints, timing precision, and ARM-specific compatibility issues reveal a more complex reality. This hands-on comparison highlights how binary size, memory footprint, and subtle platform bugs can turn a simple HTTP client into a multi-week debugging odyssey, underscoring why async runtime selection is a critical architectural decision for embedded Rust projects.