Hi Björn, On Tue, 2 Apr 2019, Björn Pettersson A wrote: > Thanks for a quick reply (with lots of details). > > Hitting some quadratic complexity algorithm explains why the "degradation" > is so huge. And if I understand it correctly we are more or less "unlucky" > to hit such access patterns more often in the new repo. > > Anyway, nice to see that you already have some ideas regarding how to > improve this. In the meantime, maybe the commit graph feature can help you? git config --global core.commitGraph true git config --global gc.writeCommitGraph true git commit-graph write --reachable The idea being that the commit graph extracts a lot of information pre-emptively and makes the lookup of those bits faster than unpacking the commits all the time. Ciao, Johannes