Author here, I'd like to see such a comparison too actually, but I'm not in the position to do the work at the moment. We did some preliminary experiments at the beginning, but a lot changed over the course of the project and I don't know how well elfshaker fares ultimately against all the options out there. Some basic tests against git found that git is quite a bit slower (10s vs 100ms) during 'git add' and git checkout. Maybe that can be fixed with some tuning or finding appropriate options.