1BRC cpp

[pr0g]

Nothing terribly clever or exciting (I also cheated and used a separate task library 😬) but this was a fun challenge to play around with. I decided to try and use buffered input instead of using mmap, it's possible rewriting to use it instead could be faster. It was telling how insanely slow stof/stod was, I switched to convert the whole and decimal parts to integers and then used from_char which was much quicker.

Gist is available here.

Runs in ~15 seconds on my MacBook Pro M1 Max (baseline takes about 3 minutes 10 seconds).