rules

• reads the file
• calculates the min, mean, and max temperature value per weather station
• emits the results on stdout like this

{Abha=-23.0/18.0/59.2, Abidjan=-16.2/26.0/67.3, Abéché=-10.0/29.4/69.0, Accra=-10.1/26.4/66.4, Addis Ababa=-23.7/16.0/67.0, Adelaide=-27.8/17.3/58.5, ...}

results (AMD Ryzen 5 5600)

• 1-dumb-solution

./1brc-go  266,48s user 5,64s system 101% cpu 4:28,38 total

• 2-read-chunks

./1brc-go  227,19s user 5,11s system 101% cpu 3:48,61 total

• 3-cache-stations

./1brc-go  195,46s user 2,65s system 97% cpu 3:22,21 total

• 4-one-map

./1brc-go  159,93s user 2,96s system 95% cpu 2:50,85 total

• 5-parallel-map-reduce

./1brc-go  210,88s user 7,24s system 879% cpu 24,794 total

• 6-fast-float-parse

./1brc-go  96,24s user 5,51s system 504% cpu 20,178 total

• 8-memory-mapped-file

./1brc-go  133,24s user 10,18s system 962% cpu 14,896 total

• 9-xxh3

./1brc-go  69,58s user 12,58s system 792% cpu 10,367 total