SUMMARY I tackle 1BRC in Fortran which requires processing 1B rows of weather station data (~15GB) to obtain min/max/mean for each station as quickly, as you can muster. I started out with a time of 2m8s and reduced it to a best run time of <6s on a 4 i7 laptop with 16GB RAM. I herein document how. INTRODUCTION The 1BRC data looks like this: Hamburg;12.0 Bulawayo;8.9 Palembang;38.8 St.