This is not guaranteed to be correct. I am still doing testing.

I decided to try out the one billion row challenge using languages I am familiar with.

1BRC winner duration thomaswue using Java -> 5 seconds

Duration of my implementations:

python -> 8 minutes 5 seconds rust -> 1 minute 31 seconds rust (mmapped) -> 1 minute 13 seconds rust (mmapped rayon) -> 10 seconds rust (unsafe mmapped rayon) -> 8 seconds rust (unsafe mmapped rayon halfbrown) -> under 3 seconds