On Fri, Dec 14, 2018 at 10:29 AM Clement Moyroud <clement.moyroud@xxxxxxxxx> wrote: > > Hello, > > My group at work is migrating a CVS repo to Git. The biggest issue we > face so far is the performance of git blame, especially compared to > CVS on the same file. One file especially causes us trouble: it's a > 30k lines file with 25 years of history in 3k+ commits. The complete > repo has 200k+ commits over that same period of time. After you converted the repository from CVS to Git, did you run a manual repack? The process of converting a repository from another SCM often results in poor delta chain selections which result in a repository that's unnecessarily large on disk, and/or performs quite slowly. Something like `git repack -Adf --depth=50 --window=200` discards the existing delta chains and chooses new ones, and may result in significantly improved performance. A smaller depth, like --depth=20, might result in even more performance improvement, but may also make the repository larger on disk; you'll need to find the balance that works for you. Might be something worth testing, if you haven't? Bryan
