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Add a test utility (test-drop-caches) that flushes all changes to disk then drops file system cache on Windows, Linux, and OSX. Add a perf test (p7519-fsmonitor.sh) for fsmonitor. By default, the performance test will utilize the Watchman file system monitor if it is installed. If Watchman is not installed, it will use a dummy integration script that does not report any new or modified files. The dummy script has very little overhead which provides optimistic results. The performance test will also use the untracked cache feature if it is available as fsmonitor uses it to speed up scanning for untracked files. There are 4 environment variables that can be used to alter the default behavior of the performance test: GIT_PERF_7519_UNTRACKED_CACHE: used to configure core.untrackedCache GIT_PERF_7519_SPLIT_INDEX: used to configure core.splitIndex GIT_PERF_7519_FSMONITOR: used to configure core.fsmonitor GIT_PERF_7519_DROP_CACHE: if set, the OS caches are dropped between tests The big win for using fsmonitor is the elimination of the need to scan the working directory looking for changed and untracked files. If the file information is all cached in RAM, the benefits are reduced. Signed-off-by: Ben Peart <benpeart@microsoft.com> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Git - fast, scalable, distributed revision control system
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 version 2 (some parts of it are under different licenses, compatible with the GPLv2). It was originally written by Linus Torvalds with help of a group of hackers around the net.
Please read the file INSTALL for installation instructions.
Many Git online resources are accessible from https://git-scm.com/ including full documentation and Git related tools.
See Documentation/gittutorial.txt to get started, then see
Documentation/giteveryday.txt for a useful minimum set of commands, and
Documentation/git-.txt for documentation of each command.
If git has been correctly installed, then the tutorial can also be
read with man gittutorial or git help tutorial, and the
documentation of each command with man git-<commandname> or git help <commandname>.
CVS users may also want to read Documentation/gitcvs-migration.txt
(man gitcvs-migration or git help cvs-migration if git is
installed).
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 (read Documentation/SubmittingPatches for instructions on patch submission). 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 https://public-inbox.org/git/, http://marc.info/?l=git and other archival sites.
The maintainer frequently sends the "What's cooking" reports that list the current status of various development topics to the mailing list. The discussion following them give a good reference for project status, development direction and remaining tasks.
The name "git" was given by Linus Torvalds when he wrote the very first version. He described the tool as "the stupid content tracker" and the name as (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