During the Hackathon I‘ll be trying to port MultiPack Bitmap Index (MIDX) to the JGit codebase. Bitmap indexes are a crucial optimization for a performant repository, unfortunately they currently work only for a single pack-file. This means that, currently, other optimizations like git exp-roll (exponential roll), aren’t as effective as they could be as using them will invalidate the current bitmap capabilities.
Introducing MIDX bitmaps to the JGit codebase will enable much greater flexibility for SCM managers all around the world.
In this talk I'll expose the progress we made during the Hackathon and outline the next steps to make MIDX files a reality in JGit.
Daniele Sassoli, Senior Engineering Manager / GerritForge Inc.