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This means we no longer have to deal with having bloated SVN working copies around and we get a nice performance increase as well because we don't have to exec the SVN binary and start a new server connection each time. Of course we have to manually manage memory with SVN::Pool whenever we can, and hack around cases where SVN just eats memory despite pools (I blame Perl, too). I would like to keep memory usage as stable as possible during long fetch/commit processes since I still use computers with only 256-512M RAM. commit should always be faster with the SVN library code. The SVN::Delta interface is leaky (or I'm not using it with pools correctly), so I'm forking on every commit, but that doesn't seem to hurt performance too much (at least on normal Unix/Linux systems where fork() is pretty cheap). fetch should be faster in most common cases, but probably not all. fetches will be faster where client/server delta generation is the bottleneck and not bandwidth. Of course, full-files are generated server-side via deltas, too. Full files are always transferred when they're updated, just like git-svnimport and unlike command-line svn. I'm also hacking around memory leaks (see comments) here by using some more forks. I've tested fetch with http://, https://, file://, and svn:// repositories, so we should be reasonably covered in terms of error handling for fetching. Of course, we'll keep plain command-line svn compatibility as a fallback for people running SVN 1.1 (I'm looking into library support for 1.1.x SVN, too). If you want to force command-line SVN usage, set GIT_SVN_NO_LIB=1 in your environment. We also require two simultaneous connections (just like git-svnimport), but this shouldn't be a problem for most servers. Less important commands: show-ignore is slower because it requires repository access, but -r/--revision <num> can be specified. graft-branches may use more memory, but it's a short-term process and is funky-filename-safe. Signed-off-by: Eric Wong <normalperson@yhbt.net> |
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Contributed Software Although these pieces are available as part of the official git source tree, they are in somewhat different status. The intention is to keep interesting tools around git here, maybe even experimental ones, to give users an easier access to them, and to give tools wider exposure, so that they can be improved faster. I am not expecting to touch these myself that much. As far as my day-to-day operation is concerned, these subdirectories are owned by their respective primary authors. I am willing to help if users of these components and the contrib/ subtree "owners" have technical/design issues to resolve, but the initiative to fix and/or enhance things _must_ be on the side of the subtree owners. IOW, I won't be actively looking for bugs and rooms for enhancements in them as the git maintainer -- I may only do so just as one of the users when I want to scratch my own itch. If you have patches to things in contrib/ area, the patch should be first sent to the primary author, and then the primary author should ack and forward it to me (git pull request is nicer). This is the same way as how I have been treating gitk, and to a lesser degree various foreign SCM interfaces, so you know the drill. I expect that things that start their life in the contrib/ area to graduate out of contrib/ once they mature, either by becoming projects on their own, or moving to the toplevel directory. On the other hand, I expect I'll be proposing removal of disused and inactive ones from time to time. If you have new things to add to this area, please first propose it on the git mailing list, and after a list discussion proves there are some general interests (it does not have to be a list-wide consensus for a tool targeted to a relatively narrow audience -- for example I do not work with projects whose upstream is svn, so I have no use for git-svn myself, but it is of general interest for people who need to interoperate with SVN repositories in a way git-svn works better than git-svnimport), submit a patch to create a subdirectory of contrib/ and put your stuff there. -jc