You can speed this up by not generating splits pages, but beyond that you just have to have patience. It takes a long time to make all these calculations & generate all these pages, I imagine most people start running the pages when they go to bed as they will be ready in the morning. When you say 55 minutes I feel jealous, it took over 5 hours the last time I ouput 7 years of pages

. You are probably doing everything correctly assuming you are following the readme.