The C++ vs Rust debate often misses the point of instruction-level optimization. I’ve been stress-testing a sub-85ns audit logic on a budget 3GB RAM ARM chip (A04e) for 10.8T datasets. Using Rust’s zero-copy and custom memory mapping, I’m getting latencies that usually require hand-tuned assembly in C++. The safety didn't cost me performance—it actually forced a better memory architecture. Has anyone else pushed ARM's L1 cache this hard for high-throughput validation?"