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"git add *" is actually fundamentally different from "git add .", and yeah, you should generally use the latter. The reason? The argument list is actually something different from what you think it is. For git, it's a "pathspec", so what actualy happens is that in *both* cases, it will really traverse the whole tree, and then match every file it finds against the pathspec. So think of the arguments not as a file list, but as a random bunch of patterns to match against the files you have! Which is why the cost is actually approximately O(n*m), where "n" is the size of the working tree, and "m" is the number of pathspecs. So the reason "git add ." is fast is actually that "m" in that case is just 1 (just one trivial pattern), and then "git add *" is slow because "m" is large (lots of complicated patterns). In both cases, 'n' is the same (== the whole set of files in your working tree). Anyway, here's a trivial patch that doesn't change this fundamental fact, but that avoids doing anything *expensive* until we've done some cheap initial tests. It may or may not help your test-case, but it's pretty simple and it matches the other git optimizations in this area (ie "conceptually handle the general case, but optimize the simple cases where we can exit early") Notice how this patch doesn' actually change the fundamental O(n^2) behaviour, but it makes it much cheaper by generally avoiding the expensive 'fnmatch' and 'strlen/strncmp' when they are obviously not needed. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
//////////////////////////////////////////////////////////////// GIT - the stupid content tracker //////////////////////////////////////////////////////////////// "git" can mean anything, depending on your mood. - random three-letter combination that is pronounceable, and not actually used by any common UNIX command. The fact that it is a mispronunciation of "get" may or may not be relevant. - stupid. contemptible and despicable. simple. Take your pick from the dictionary of slang. - "global information tracker": you're in a good mood, and it actually works for you. Angels sing, and a light suddenly fills the room. - "goddamn idiotic truckload of sh*t": when it breaks Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals. Git is an Open Source project covered by the GNU General Public License. It was originally written by Linus Torvalds with help of a group of hackers around the net. It is currently maintained by Junio C Hamano. Please read the file INSTALL for installation instructions. See Documentation/tutorial.txt to get started, then see Documentation/everyday.txt for a useful minimum set of commands, and "man git-commandname" for documentation of each command. CVS users may also want to read Documentation/cvs-migration.txt. Many Git online resources are accessible from http://git.or.cz/ including full documentation and Git related tools. The user discussion and development of Git take place on the Git mailing list -- everyone is welcome to post bug reports, feature requests, comments and patches to git@vger.kernel.org. To subscribe to the list, send an email with just "subscribe git" in the body to majordomo@vger.kernel.org. The mailing list archives are available at http://marc.theaimsgroup.com/?l=git and other archival sites. The messages titled "A note from the maintainer", "What's in git.git (stable)" and "What's cooking in git.git (topics)" and the discussion following them on the mailing list give a good reference for project status, development direction and remaining tasks.