An old M1 Mac putting out 16 gigabits per second of packets, all built in Rust with LLM help. Alex and Brian from Speedify dig into how to actually get Claude to write the fastest Rust code possible, including why you should build your test harness in a completely separate LLM session (so the LLM doesn’t make the same bugs in the tests that it makes in the code), how to micro benchmark every Rust library choice on the critical path for premature optimization, why switching from Python to Rust gets you a 20x speedup for free, and why Claude still defaults to writing Python for most tasks anyway.
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