The story of some foibles and successes in scaling jgit, H2Caches, and Gerrit, in both time and space. This will cover many smaller and some larger improvements which have been merged in the last year, along with some experiments and designs which I hope can bring some more improvements to these systems in the next year. This includes some very deep reaching attempts at improving the speed and memory utilization of large fetches/clones, along with some attempts and ideas on how to improve the bottlenecks with large pack ref files.
