On Wed, Oct 03, 2018 at 08:47:11PM +0200, Ævar Arnfjörð Bjarmason wrote:
> > On Wed, Oct 03 2018, Stefan Beller wrote: > > >> So we wouldn't be spending 5 minutes repacking linux.git right after > >> cloning it, just ~10s generating the commit graph, and the same would > >> happen if you rm'd .git/objects/info/commit-graph and ran "git commit", > >> which would kick of "gc --auto" in the background and do the same thing. > > > > Or generating local bitmaps or pack idx files as well? > > I'm less familiar with this area, but when I clone I get a pack *.idx > file, why does it need to be regenerated? > > But yeah, in principle this would be a sensible addition, but I'm not > aware of cases where clients get significant benefits from bitmaps (see > https://githubengineering.com/counting-objects/), and I don't turn it on > for clients, but maybe I've missed something. They don't help yet, and there's no good reason to enable bitmaps for clients. I have a few patches that use bitmaps for things like ahead/behind and --contains checks, but the utility of those may be lessened quite a bit by Stolee's commit-graph work. And if it isn't, I'm mildly in favor of replacing the existing .bitmap format with something better integrated with commit-graphs (which would give us an opportunity to clean up some of the rough edges). -Peff
