Got my "extrapolated for a machine with more RAM" 1BRC-in-Rust time down to 2 seconds on my M1 MacBook Air, pretty happy with that. Not bad for a 5½yo fanless laptop.
(I just use 3e8 entries and divide the time by 0.3; the benchmark assumes a warm start and enough RAM to cache the entire file, which I don't quite have)



