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This gives us a significant speedup when adding, committing and stat'ing files. Also, since Windows doesn't really handle symlinks, we let stat just uses lstat. We also need to replace fstat, since our implementation and the standard stat() functions report slightly different timestamps, possibly due to timezones. We simply report UTC in our implementation, and do our FILETIME to time_t conversion based on the document at http://support.microsoft.com/kb/167296. With Moe's repo structure (100K files in 100 dirs, containing 2-4 bytes) mkdir bummer && cd bummer; for ((i=0;i<100;i++)); do mkdir $i && pushd $i; for ((j=0;j<1000;j++)); do echo "$j" >$j; done; popd; done We get the following performance boost: With normal lstat & stat Custom lstat/fstat ------------------------ ------------------------ Command: git init Command: git init ------------------------ ------------------------ real 0m 0.047s real 0m 0.063s user 0m 0.031s user 0m 0.015s sys 0m 0.000s sys 0m 0.015s ------------------------ ------------------------ Command: git add . Command: git add . ------------------------ ------------------------ real 0m19.390s real 0m12.031s 1.6x user 0m 0.015s user 0m 0.031s sys 0m 0.030s sys 0m 0.000s ------------------------ ------------------------ Command: git commit -a.. Command: git commit -a.. ------------------------ ------------------------ real 0m30.812s real 0m16.875s 1.8x user 0m 0.015s user 0m 0.015s sys 0m 0.000s sys 0m 0.015s ------------------------ ------------------------ 3x Command: git-status 3x Command: git-status ------------------------ ------------------------ real 0m11.860s real 0m 5.266s 2.2x user 0m 0.015s user 0m 0.015s sys 0m 0.015s sys 0m 0.015s real 0m11.703s real 0m 5.234s user 0m 0.015s user 0m 0.015s sys 0m 0.000s sys 0m 0.000s real 0m11.672s real 0m 5.250s user 0m 0.031s user 0m 0.015s sys 0m 0.000s sys 0m 0.000s ------------------------ ------------------------ Command: git commit... Command: git commit... (single file) (single file) ------------------------ ------------------------ real 0m14.234s real 0m 7.735s 1.8x user 0m 0.015s user 0m 0.031s sys 0m 0.000s sys 0m 0.000s Signed-off-by: Marius Storm-Olsen <mstormo_git@storm-olsen.com> Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
//////////////////////////////////////////////////////////////// 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.