Shell

On Apple Silicon (macOS), a Rust tokio TCP echo proxy has ~11% lower median (p50) latency than a Go goroutine-based TCP echo proxy (957us vs 1065us), but Go has ~18% lower p99 latency (2182us vs 2648us) and ~28% lower p99.9 latency (2388us vs 3339us) under 500 concurrent connections with 50k total requests. Contrary to the common claim that Rust dominates tail latency, Go goroutine scheduler produces tighter tail distributions on this platform.