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Jeff King 183a638b7d hashcmp: assert constant hash size 
Prior to 509f6f62a4 (cache: update object ID functions for
the_hash_algo, 2018-07-16), hashcmp() called memcmp() with a
constant size of 20 bytes. Some compilers were able to turn
that into a few quad-word comparisons, which is faster than
actually calling memcmp().

In 509f6f62a4, we started using the_hash_algo->rawsz
instead. Even though this will always be 20, the compiler
doesn't know that while inlining hashcmp() and ends up just
generating a call to memcmp().

Eventually we'll have to deal with multiple hash sizes, but
for the upcoming v2.19, we can restore some of the original
performance by asserting on the size. That gives the
compiler enough information to know that the memcmp will
always be called with a length of 20, and it performs the
same optimization.

Here are numbers for p0001.2 run against linux.git on a few
versions. This is using -O2 with gcc 8.2.0.

  Test     v2.18.0             v2.19.0-rc0               HEAD
  ------------------------------------------------------------------------------
  0001.2:  34.24(33.81+0.43)   34.83(34.42+0.40) +1.7%   33.90(33.47+0.42) -1.0%

You can see that v2.19 is a little slower than v2.18. This
commit ended up slightly faster than v2.18, but there's a
fair bit of run-to-run noise (the generated code in the two
cases is basically the same). This patch does seem to be
consistently 1-2% faster than v2.19.

I tried changing hashcpy(), which was also touched by
509f6f62a4, in the same way, but couldn't measure any
speedup. Which makes sense, at least for this workload. A
traversal of the whole commit graph requires looking up
every entry of every tree via lookup_object(). That's many
multiples of the numbers of objects in the repository (most
of the lookups just return "yes, we already saw that
object").

[jn: verified using "make object.s" that the memcmp call goes away.]

Reported-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Jeff King <peff@peff.net
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-23 06:20:58 -07:00
.github
block-sha1
builtin Merge branch 'nd/pack-deltify-regression-fix' 2018-08-22 11:17:05 -07:00
ci Merge branch 'nd/pack-deltify-regression-fix' 2018-08-22 11:17:05 -07:00
compat Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
contrib Merge branch 'js/range-diff' 2018-08-20 11:33:53 -07:00
Documentation Git 2.19-rc0 2018-08-20 12:53:58 -07:00
ewah ewah: delete unused 'rlwit_discharge_empty()' 2018-06-21 09:39:48 -07:00
git-gui Merge branch 'cb/git-gui-ttk-style' 2018-04-25 13:28:49 +09:00
gitk-git
gitweb gitweb: hard-depend on the Digest::MD5 5.8 module 2018-03-05 10:52:27 -08:00
mergetools mergetools: add support for guiffy 2018-04-06 08:11:39 +09:00
negotiator Merge branch 'jt/fetch-negotiator-skipping' 2018-08-02 15:30:46 -07:00
perl Merge branch 'ab/git-svn-get-record-typofix' 2018-05-08 15:59:28 +09:00
po l10n: ko.po: Update Korean translation 2018-06-19 02:19:42 +09:00
ppc
refs Merge branch 'jk/size-t' 2018-08-15 15:08:25 -07:00
sha1collisiondetection@232357eb2e sha1dc: update from upstream 2018-08-02 13:54:58 -07:00
sha1dc sha1dc: update from upstream 2018-08-02 13:54:58 -07:00
t Merge branch 'nd/pack-deltify-regression-fix' 2018-08-22 11:17:05 -07:00
templates Update shell scripts to compute empty tree object ID 2018-05-02 13:59:53 +09:00
vcs-svn Convert remaining die*(BUG) messages 2018-05-06 19:06:14 +09:00
xdiff Merge branch 'sb/indent-heuristic-optim' 2018-08-17 13:09:57 -07:00
.clang-format clang-format: adjust penalty for return type line break 2018-01-24 13:42:04 -08:00
.gitattributes .gitattributes: add a diff driver for Python 2018-04-27 09:18:55 +09:00
.gitignore Merge branch 'js/range-diff' 2018-08-20 11:33:53 -07:00
.gitmodules
.mailmap .mailmap: merge different spellings of names 2018-06-29 09:29:44 -07:00
.travis.yml travis-ci: run gcc-8 on linux-gcc jobs 2018-05-21 14:14:09 +09:00
.tsan-suppressions
abspath.c
aclocal.m4
advice.c Merge branch 'ab/checkout-default-remote' 2018-08-02 15:30:41 -07:00
advice.h Merge branch 'ab/checkout-default-remote' 2018-08-02 15:30:41 -07:00
alias.c completion: add and use --list-cmds=alias 2018-05-21 13:23:14 +09:00
alias.h completion: add and use --list-cmds=alias 2018-05-21 13:23:14 +09:00
alloc.c alloc: make allocate_alloc_state and clear_alloc_state more consistent 2018-08-15 11:52:09 -07:00
alloc.h alloc: make allocate_alloc_state and clear_alloc_state more consistent 2018-08-15 11:52:09 -07:00
apply.c apply.c: remove implicit dependency on the_index 2018-08-13 14:14:44 -07:00
apply.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
archive-tar.c Merge branch 'nd/no-the-index' 2018-08-20 11:33:53 -07:00
archive-zip.c Merge branch 'nd/no-the-index' 2018-08-20 11:33:53 -07:00
archive.c archive.c: avoid access to the_index 2018-08-13 14:14:43 -07:00
archive.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
argv-array.c Merge branch 'ma/unpack-trees-free-msgs' 2018-05-30 21:51:29 +09:00
argv-array.h Merge branch 'ma/unpack-trees-free-msgs' 2018-05-30 21:51:29 +09:00
attr.c attr: remove index from git_attr_set_direction() 2018-08-13 14:14:43 -07:00
attr.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
banned.h banned.h: mark strncpy() as banned 2018-07-26 10:12:51 -07:00
base85.c
bisect.c commit: add repository argument to lookup_commit_reference 2018-06-29 10:43:39 -07:00
bisect.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
blame.c blame.c: remove implicit dependency on the_index 2018-08-13 14:14:44 -07:00
blame.h blame.c: remove implicit dependency on the_index 2018-08-13 14:14:44 -07:00
blob.c blob: allow lookup_blob to handle arbitrary repositories 2018-06-29 10:43:39 -07:00
blob.h blob: allow lookup_blob to handle arbitrary repositories 2018-06-29 10:43:39 -07:00
branch.c Merge branch 'sb/object-store-grafts' 2018-07-18 12:20:28 -07:00
branch.h Move definition of enum branch_track from cache.h to branch.h 2018-08-15 11:52:09 -07:00
builtin.h Introduce range-diff to compare iterations of a topic branch 2018-08-13 10:44:50 -07:00
bulk-checkin.c Merge branch 'sb/object-store-grafts' 2018-07-18 12:20:28 -07:00
bulk-checkin.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
bundle.c Merge branch 'sb/object-store-grafts' 2018-07-18 12:20:28 -07:00
bundle.h
cache-tree.c cache-tree: wrap the_index based wrappers with #ifdef 2018-08-13 14:14:42 -07:00
cache-tree.h cache-tree: wrap the_index based wrappers with #ifdef 2018-08-13 14:14:42 -07:00
cache.h hashcmp: assert constant hash size 2018-08-23 06:20:58 -07:00
chdir-notify.c add chdir-notify API 2018-03-30 12:49:57 -07:00
chdir-notify.h add chdir-notify API 2018-03-30 12:49:57 -07:00
check-builtins.sh
check-racy.c
check_bindir
checkout.c checkout & worktree: introduce checkout.defaultRemote 2018-06-11 09:41:02 -07:00
checkout.h checkout: pass the "num_matches" up to callers 2018-06-11 09:41:01 -07:00
color.c color: protect against out-of-bounds reads and writes 2018-08-03 08:52:05 -07:00
color.h range-diff: use dim/bold cues to improve dual color mode 2018-08-13 10:44:52 -07:00
column.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
column.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
combine-diff.c object-store: move object access functions to object-store.h 2018-05-16 11:42:03 +09:00
command-list.txt Introduce range-diff to compare iterations of a topic branch 2018-08-13 10:44:50 -07:00
commit-graph.c Merge branch 'jk/for-each-object-iteration' 2018-08-20 11:33:52 -07:00
commit-graph.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
commit-slab-decl.h commit-slab: support shared commit-slab 2018-05-21 14:07:19 +09:00
commit-slab-impl.h commit-slabs: remove realloc counter outside of slab struct 2018-06-29 10:43:40 -07:00
commit-slab.h commit-slab: support shared commit-slab 2018-05-21 14:07:19 +09:00
commit.c Merge branch 'jt/commit-graph-per-object-store' 2018-08-02 15:30:47 -07:00
commit.h Merge branch 'sb/object-store-lookup' 2018-08-02 15:30:42 -07:00
common-main.c Merge branch 'dj/runtime-prefix' 2018-05-08 15:59:17 +09:00
config.c Merge branch 'sb/config-write-fix' 2018-08-20 12:41:32 -07:00
config.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
config.mak.dev Makefile: add a DEVOPTS flag to get pedantic compilation 2018-07-25 09:52:32 -07:00
config.mak.in
config.mak.uname mingw: define WIN32 explicitly 2018-07-30 13:14:39 -07:00
configure.ac Merge branch 'es/fread-reads-dir-autoconf-fix' 2018-04-25 13:29:01 +09:00
connect.c connect.c: mark more strings for translation 2018-07-23 11:19:10 -07:00
connect.h fixup! connect.h: avoid forward declaration of an enum 2018-07-09 14:35:39 -07:00
connected.c fetch-pack: write shallow, then check connectivity 2018-07-03 14:57:44 -07:00
connected.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
convert.c Merge branch 'nd/no-the-index' 2018-08-20 11:33:53 -07:00
convert.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
copy.c
COPYING
credential-cache--daemon.c
credential-cache.c
credential-store.c
credential.c credential: ignore SIGPIPE when writing to credential helpers 2018-03-29 15:33:55 -07:00
credential.h
csum-file.c csum-file: refactor finalize_hashfile() method 2018-04-02 14:27:30 -07:00
csum-file.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
ctype.c
daemon.c Merge branch 'lw/daemon-log-destination' 2018-04-25 13:28:58 +09:00
date.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
decorate.c
decorate.h
delta.h
detect-compiler Makefile: detect compiler and enable more warnings in DEVELOPER=1 2018-04-16 13:54:53 +09:00
diff-delta.c
diff-lib.c dir.c: remove an implicit dependency on the_index in pathspec code 2018-08-13 14:14:42 -07:00
diff-no-index.c
diff.c Merge branch 'js/range-diff' 2018-08-20 11:33:53 -07:00
diff.h Merge branch 'js/range-diff' 2018-08-20 11:33:53 -07:00
diffcore-break.c
diffcore-delta.c diffcore-delta: rename 'new' variables 2018-02-22 10:08:05 -08:00
diffcore-order.c
diffcore-pickaxe.c regex: do not call regfree() if compilation fails 2018-05-21 13:58:32 +09:00
diffcore-rename.c object-store: move object access functions to object-store.h 2018-05-16 11:42:03 +09:00
diffcore.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
dir-iterator.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
dir-iterator.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
dir.c Merge branch 'nd/no-the-index' 2018-08-20 11:33:53 -07:00
dir.h dir.c: remove an implicit dependency on the_index in pathspec code 2018-08-13 14:14:42 -07:00
editor.c
entry.c entry.c: use the right index instead of the_index 2018-08-13 14:14:43 -07:00
environment.c Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
exec-cmd.c exec-cmd.c: mark more strings for translation 2018-07-23 11:19:10 -07:00
exec-cmd.h Merge branch 'dj/runtime-prefix' 2018-05-08 15:59:17 +09:00
fast-import.c Merge branch 'sb/object-store-lookup' 2018-08-02 15:30:42 -07:00
fetch-negotiator.c negotiator: unknown fetch.negotiationAlgorithm should error out 2018-08-01 11:07:47 -07:00
fetch-negotiator.h negotiator/skipping: skip commits during fetch 2018-07-16 14:51:12 -07:00
fetch-object.c fetch-pack: unify ref in and out param 2018-08-01 15:00:52 -07:00
fetch-object.h
fetch-pack.c Merge branch 'ab/fsck-transfer-updates' 2018-08-17 13:09:54 -07:00
fetch-pack.h Merge branch 'jt/fetch-nego-tip' 2018-08-02 15:30:43 -07:00
fmt-merge-msg.h
fsck.c Merge branch 'sb/object-store-lookup' 2018-08-02 15:30:42 -07:00
fsck.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
fsmonitor.c Merge branch 'jk/snprintf-truncation' 2018-05-30 21:51:28 +09:00
fsmonitor.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
generate-cmdlist.sh help: add --config to list all available config 2018-05-29 14:51:28 +09:00
gettext.c Merge branch 'js/runtime-prefix' 2018-05-08 15:59:34 +09:00
gettext.h
git-add--interactive.perl Merge branch 'pw/add-p-recount' 2018-06-28 12:53:32 -07:00
git-archimport.perl
git-bisect.sh
git-compat-util.h Merge branch 'js/typofixes' 2018-08-20 11:33:50 -07:00
git-cvsexportcommit.perl
git-cvsimport.perl perl: call timegm and timelocal with 4-digit year 2018-02-23 14:47:06 -08:00
git-cvsserver.perl
git-difftool--helper.sh
git-filter-branch.sh Merge branch 'mb/filter-branch-optim' 2018-07-18 12:20:32 -07:00
git-instaweb.sh git-instaweb: fix apache2 config with apache >= 2.4 2018-08-08 08:30:07 -07:00
git-merge-octopus.sh
git-merge-one-file.sh merge-one-file: compute empty blob object ID 2018-05-02 13:59:53 +09:00
git-merge-resolve.sh
git-mergetool--lib.sh
git-mergetool.sh mergetool: don't suggest to continue after last file 2018-08-13 12:11:19 -07:00
git-p4.py git-p4: add the p4-pre-submit hook 2018-08-01 13:37:18 -07:00
git-parse-remote.sh
git-quiltimport.sh
git-rebase--am.sh Merge branch 'pw/rebase-signoff' 2018-04-25 13:28:51 +09:00
git-rebase--interactive.sh Merge branch 'ag/rebase-p' 2018-06-25 13:22:39 -07:00
git-rebase--merge.sh Merge branch 'en/rebase-i-microfixes' 2018-07-18 12:20:33 -07:00
git-rebase--preserve-merges.sh git-rebase--preserve-merges: fix formatting of todo help message 2018-07-06 12:09:27 -07:00
git-rebase.sh Merge branch 'en/rebase-consistency' 2018-07-24 14:50:43 -07:00
git-remote-testgit.sh
git-request-pull.sh
git-send-email.perl Merge branch 'jm/send-email-tls-auth-on-batch' 2018-08-02 15:30:46 -07:00
git-sh-i18n.sh git-sh-i18n: check GETTEXT_POISON before USE_GETTEXT_SCHEME 2018-02-08 10:09:45 -08:00
git-sh-setup.sh
git-stash.sh Merge branch 'tg/stash-untracked-with-pathspec-fix' 2018-04-10 08:25:45 +09:00
git-submodule.sh Merge branch 'sb/pull-rebase-submodule' 2018-08-20 11:33:54 -07:00
git-svn.perl git-svn: search --authors-prog in PATH too 2018-04-05 06:55:02 +00:00
GIT-VERSION-GEN Git 2.19-rc0 2018-08-20 12:53:58 -07:00
git-web--browse.sh
git.c Merge branch 'js/range-diff' 2018-08-20 11:33:53 -07:00
git.rc
gpg-interface.c Merge branch 'jc/gpg-status' 2018-08-20 11:33:50 -07:00
gpg-interface.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
graph.c
graph.h
grep.c Merge branch 'tb/grep-only-matching' 2018-08-02 15:30:44 -07:00
grep.h Merge branch 'tb/grep-only-matching' 2018-08-02 15:30:44 -07:00
hash.h hash: update obsolete reference to SHA1_HEADER 2018-02-09 09:56:10 -08:00
hashmap.c
hashmap.h Merge branch 'rb/hashmap-h-compilation-fix' into maint 2018-03-22 14:24:15 -07:00
help.c Merge branch 'hn/highlight-sideband-keywords' 2018-08-20 12:41:34 -07:00
help.h sideband: highlight keywords in remote sideband output 2018-08-08 15:20:09 -07:00
hex.c hex: switch to using the_hash_algo 2018-07-16 14:27:39 -07:00
http-backend.c Merge branch 'mk/http-backend-content-length' 2018-08-17 13:09:57 -07:00
http-fetch.c Merge branch 'ma/http-walker-no-partial' 2018-05-08 15:59:35 +09:00
http-push.c tag: add repository argument to deref_tag 2018-06-29 10:43:39 -07:00
http-walker.c Merge branch 'sb/object-store' 2018-04-11 13:09:55 +09:00
http.c Merge branch 'bw/remote-curl-compressed-responses' 2018-05-30 21:51:29 +09:00
http.h Merge branch 'jk/snprintf-truncation' 2018-05-30 21:51:28 +09:00
ident.c
imap-send.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
INSTALL RelNotes: add details on Perl module changes 2018-03-16 16:07:37 -07:00
iterator.h
json-writer.c json_writer: new routines to create JSON data 2018-07-16 13:55:39 -07:00
json-writer.h json_writer: new routines to create JSON data 2018-07-16 13:55:39 -07:00
khash.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
kwset.c
kwset.h
levenshtein.c
levenshtein.h
LGPL-2.1
line-log.c Merge branch 'sb/object-store-lookup' 2018-08-02 15:30:42 -07:00
line-log.h
line-range.c blame: prevent error if range ends past end of file 2018-06-15 10:29:13 -07:00
line-range.h line-range.h: drop extern from function declaration 2018-08-03 10:42:55 -07:00
linear-assignment.c linear-assignment: a function to solve least-cost assignment problems 2018-08-13 10:44:50 -07:00
linear-assignment.h linear-assignment: a function to solve least-cost assignment problems 2018-08-13 10:44:50 -07:00
list-objects-filter-options.c list-objects: check if filter is NULL before using 2018-06-12 10:46:56 -07:00
list-objects-filter-options.h
list-objects-filter.c Merge branch 'sb/object-store-grafts' 2018-07-18 12:20:28 -07:00
list-objects-filter.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
list-objects.c Merge branch 'sb/object-store-lookup' 2018-08-02 15:30:42 -07:00
list-objects.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
list.h
ll-merge.c attr: remove an implicit dependency on the_index 2018-08-13 14:14:42 -07:00
ll-merge.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
lockfile.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
lockfile.h
log-tree.c Merge branch 'jk/core-use-replace-refs' 2018-08-15 15:08:23 -07:00
log-tree.h format-patch: make cover letters always text/plain 2018-05-02 12:55:00 +09:00
ls-refs.c ls-refs: introduce ls-refs server command 2018-03-15 12:01:08 -07:00
ls-refs.h ls-refs: introduce ls-refs server command 2018-03-15 12:01:08 -07:00
mailinfo.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
mailinfo.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
mailmap.c object-store: move object access functions to object-store.h 2018-05-16 11:42:03 +09:00
mailmap.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
Makefile Merge branch 'js/range-diff' 2018-08-20 11:33:53 -07:00
match-trees.c Merge branch 'jk/merge-subtree-heuristics' 2018-08-17 13:09:55 -07:00
mem-pool.c block alloc: add validations around cache_entry lifecyle 2018-07-03 10:58:27 -07:00
mem-pool.h block alloc: add validations around cache_entry lifecyle 2018-07-03 10:58:27 -07:00
merge-blobs.c object-store: move object access functions to object-store.h 2018-05-16 11:42:03 +09:00
merge-blobs.h
merge-recursive.c Merge branch 'nd/no-the-index' 2018-08-20 11:33:53 -07:00
merge-recursive.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
merge.c Merge branch 'en/dirty-merge-fixes' 2018-08-02 15:30:45 -07:00
mergesort.c
mergesort.h
name-hash.c Merge branch 'bp/name-hash-dirname-fix' 2018-02-27 10:33:53 -08:00
notes-cache.c commit: add repository argument to lookup_commit_reference_gently 2018-06-29 10:43:39 -07:00
notes-cache.h
notes-merge.c Merge branch 'sb/object-store-grafts' 2018-07-18 12:20:28 -07:00
notes-merge.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
notes-utils.c commit: add repository argument to lookup_commit 2018-06-29 10:43:39 -07:00
notes-utils.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
notes.c object-store: move object access functions to object-store.h 2018-05-16 11:42:03 +09:00
notes.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
object-store.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
object.c Merge branch 'nd/i18n' 2018-08-15 15:08:23 -07:00
object.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
oidmap.c oidmap: ensure map is initialized 2017-12-27 12:28:06 -08:00
oidmap.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
oidset.c
oidset.h oidset: don't return value from oidset_init 2018-01-08 15:24:35 -08:00
pack-bitmap-write.c Merge branch 'jt/remove-pack-bitmap-global' 2018-07-18 12:20:30 -07:00
pack-bitmap.c pack-bitmap: add free function 2018-06-21 12:22:48 -07:00
pack-bitmap.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
pack-check.c packfile: add repository argument to unpack_entry 2018-04-26 10:54:27 +09:00
pack-objects.c Merge branch 'nd/pack-deltify-regression-fix' 2018-08-22 11:17:05 -07:00
pack-objects.h Merge branch 'nd/pack-deltify-regression-fix' 2018-08-22 11:17:05 -07:00
pack-revindex.c object-store: move packed_git and packed_git_mru to object store 2018-03-26 10:05:46 -07:00
pack-revindex.h
pack-write.c csum-file: refactor finalize_hashfile() method 2018-04-02 14:27:30 -07:00
pack.h csum-file: rename sha1file to hashfile 2018-02-02 11:28:41 -08:00
packfile.c for_each_packed_object: support iterating in pack-order 2018-08-13 13:48:28 -07:00
packfile.h Merge branch 'jk/for-each-object-iteration' 2018-08-20 11:33:52 -07:00
pager.c Merge branch 'nd/command-list' 2018-06-01 15:06:37 +09:00
parse-options-cb.c commit: add repository argument to lookup_commit_reference 2018-06-29 10:43:39 -07:00
parse-options.c Merge branch 'rs/parse-opt-lithelp' 2018-08-17 13:09:56 -07:00
parse-options.h Merge branch 'ps/contains-id-error-message' 2018-04-10 16:28:20 +09:00
patch-delta.c
patch-ids.c
patch-ids.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
path.c Merge branch 'sb/object-store-grafts' 2018-07-18 12:20:28 -07:00
path.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
pathspec.c pathspec.c: use the right index instead of the_index 2018-08-13 14:14:43 -07:00
pathspec.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
pkt-line.c pkt-line.c: mark more strings for translation 2018-07-23 11:19:10 -07:00
pkt-line.h pkt-line: add packet_buf_write_len function 2018-03-15 12:01:09 -07:00
preload-index.c preload-index.c: use the right index instead of the_index 2018-08-13 14:14:42 -07:00
pretty.c Merge branch 'jk/size-t' 2018-08-15 15:08:25 -07:00
pretty.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
prio-queue.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
prio-queue.h
progress.c
progress.h
prompt.c
prompt.h
protocol.c protocol: introduce enum protocol_version value protocol_v2 2018-03-14 14:15:07 -07:00
protocol.h protocol: introduce enum protocol_version value protocol_v2 2018-03-14 14:15:07 -07:00
quote.c Merge branch 'jk/sq-dequote-on-bogus-input' 2018-02-27 10:34:02 -08:00
quote.h trace: avoid unnecessary quoting 2018-01-16 12:16:54 -08:00
range-diff.c range-diff: left-pad patch numbers 2018-08-13 10:44:52 -07:00
range-diff.h range-diff: also show the diff between patches 2018-08-13 10:44:50 -07:00
reachable.c tree: add repository argument to lookup_tree 2018-06-29 10:43:38 -07:00
reachable.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
read-cache.c Merge branch 'nd/no-the-index' 2018-08-20 11:33:53 -07:00
README.md note git-security@googlegroups.com in more places 2018-06-01 09:24:11 +09:00
ref-filter.c Merge branch 'ot/ref-filter-object-info' 2018-08-17 13:09:57 -07:00
ref-filter.h Merge branch 'ot/libify-get-ref-atom-value' 2018-05-08 15:59:18 +09:00
reflog-walk.c Merge branch 'nd/i18n' 2018-08-15 15:08:23 -07:00
reflog-walk.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
refs.c Merge branch 'jt/refspec-dwim-precedence-fix' 2018-08-17 13:09:55 -07:00
refs.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
refspec.c refspec.c: mark more strings for translation 2018-07-23 11:19:10 -07:00
refspec.h refspec: add back a refspec_item_init() function 2018-06-11 10:11:31 -07:00
RelNotes Prepare to start 2.19 cycle 2018-06-25 13:22:27 -07:00
remote-curl.c Merge branch 'js/typofixes' 2018-08-20 11:33:50 -07:00
remote-testsvn.c Merge branch 'sb/object-store-grafts' 2018-07-18 12:20:28 -07:00
remote.c Merge branch 'jt/refspec-dwim-precedence-fix' 2018-08-17 13:09:55 -07:00
remote.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
replace-object.c Merge branch 'nd/i18n' 2018-08-15 15:08:23 -07:00
replace-object.h check_replace_refs: rename to read_replace_refs 2018-07-18 15:45:14 -07:00
repository.c Merge branch 'sb/object-store-alloc' 2018-06-25 13:22:38 -07:00
repository.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
rerere.c dir.c: remove an implicit dependency on the_index in pathspec code 2018-08-13 14:14:42 -07:00
rerere.h rerere.h: drop extern from function declaration 2018-08-03 10:42:55 -07:00
resolve-undo.c resolve-undo.c: use the right index instead of the_index 2018-08-13 14:14:44 -07:00
resolve-undo.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
revision.c dir.c: remove an implicit dependency on the_index in pathspec code 2018-08-13 14:14:42 -07:00
revision.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
run-command.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
run-command.h
send-pack.c shallow: add repository argument to is_repository_shallow 2018-05-18 08:13:10 +09:00
send-pack.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
sequencer.c Merge branch 'pw/rebase-i-merge-segv-fix' 2018-08-20 12:41:33 -07:00
sequencer.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
serve.c serve: introduce the server-option capability 2018-04-24 11:24:40 +09:00
serve.h serve: introduce git-serve 2018-03-15 12:01:08 -07:00
server-info.c tag: add repository argument to deref_tag 2018-06-29 10:43:39 -07:00
setup.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
sh-i18n--envsubst.c
sha1-array.c get_short_oid: sort ambiguous objects by type, then SHA-1 2018-05-11 14:43:23 +09:00
sha1-array.h get_short_oid: sort ambiguous objects by type, then SHA-1 2018-05-11 14:43:23 +09:00
sha1-file.c Merge branch 'nd/no-the-index' 2018-08-20 11:33:53 -07:00
sha1-lookup.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
sha1-lookup.h packfile: refactor hash search with fanout table 2018-02-15 13:08:55 -08:00
sha1-name.c Merge branch 'sb/object-store-lookup' 2018-08-02 15:30:42 -07:00
sha1dc_git.c
sha1dc_git.h
shallow.c Merge branch 'sb/object-store-grafts' 2018-07-18 12:20:28 -07:00
shell.c Merge branch 'nd/command-list' 2018-06-01 15:06:37 +09:00
shortlog.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
sideband.c sideband: do not read beyond the end of input 2018-08-18 09:16:48 -07:00
sideband.h
sigchain.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
sigchain.h
split-index.c block alloc: allocate cache entries from mem_pool 2018-07-03 10:58:27 -07:00
split-index.h split-index: convert struct split_index to object_id 2018-05-02 13:59:50 +09:00
strbuf.c Merge branch 'jk/size-t' 2018-08-15 15:08:25 -07:00
strbuf.h Merge branch 'en/rename-directory-detection-reboot' 2018-05-23 14:38:19 +09:00
streaming.c cache.h: add repository argument to oid_object_info_extended 2018-04-26 10:54:27 +09:00
streaming.h streaming: convert open_istream to use struct object_id 2018-03-14 09:23:49 -07:00
string-list.c string-list.c: avoid conversion from void * to function pointer 2018-07-09 14:37:50 -07:00
string-list.h
sub-process.c
sub-process.h Docs: split out long-running subprocess handshake 2018-01-25 11:24:32 -08:00
submodule-config.c Merge branch 'jk/fsck-gitmodules-gently' 2018-08-02 15:30:39 -07:00
submodule-config.h submodule-config: make 'config_from_gitmodules' private 2018-06-26 12:56:12 -07:00
submodule.c submodule.c: use the right index instead of the_index 2018-08-13 14:14:43 -07:00
submodule.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
symlinks.c
tag.c Merge branch 'jt/tags-to-promised-blobs-fix' 2018-08-02 15:30:46 -07:00
tag.h tag.c: allow deref_tag to handle arbitrary repositories 2018-06-29 10:43:40 -07:00
tar.h
tempfile.c tempfile: rename 'template' variables 2018-02-22 10:08:05 -08:00
tempfile.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
thread-utils.c
thread-utils.h
tmp-objdir.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
tmp-objdir.h
trace.c trace.c: export trace_setup_key 2018-03-30 12:49:57 -07:00
trace.h trace.c: export trace_setup_key 2018-03-30 12:49:57 -07:00
trailer.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
trailer.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
transport-helper.c Merge branch 'jt/connectivity-check-after-unshallow' 2018-08-15 15:08:28 -07:00
transport-internal.h fetch-pack: unify ref in and out param 2018-08-01 15:00:52 -07:00
transport.c Merge branch 'jt/connectivity-check-after-unshallow' 2018-08-15 15:08:28 -07:00
transport.h Merge branch 'jt/connectivity-check-after-unshallow' 2018-08-15 15:08:28 -07:00
tree-diff.c
tree-walk.c Merge branch 'bc/object-id' 2018-08-02 15:30:39 -07:00
tree-walk.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
tree.c Merge branch 'jm/cache-entry-from-mem-pool' 2018-08-02 15:30:43 -07:00
tree.h tree: allow lookup_tree to handle arbitrary repositories 2018-06-29 10:43:39 -07:00
unicode-width.h unicode: update the width tables to Unicode 11 2018-07-09 14:02:51 -07:00
unimplemented.sh
unix-socket.c
unix-socket.h
unpack-trees.c attr: remove index from git_attr_set_direction() 2018-08-13 14:14:43 -07:00
unpack-trees.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
upload-pack.c Merge branch 'sb/object-store-lookup' 2018-08-02 15:30:42 -07:00
upload-pack.h fetch-pack: perform a fetch using v2 2018-03-15 12:01:08 -07:00
url.c
url.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
urlmatch.c
urlmatch.h urlmatch.h: fix include guard 2018-08-15 11:52:09 -07:00
usage.c Merge branch 'jk/snprintf-truncation' 2018-05-30 21:51:28 +09:00
userdiff.c attr: remove an implicit dependency on the_index 2018-08-13 14:14:42 -07:00
userdiff.h
utf8.c Merge branch 'jk/size-t' 2018-08-15 15:08:25 -07:00
utf8.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
varint.c
varint.h
version.c
version.h
versioncmp.c
walker.c Merge branch 'sb/object-store-grafts' 2018-07-18 12:20:28 -07:00
walker.h walker: drop fields of struct walker which are always 1 2018-04-24 10:55:04 +09:00
wildmatch.c
wildmatch.h
worktree.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
worktree.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
wrap-for-bin.sh Make running git under other debugger-like programs easy 2018-04-25 10:47:22 +09:00
wrapper.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
write-or-die.c write_or_die.c: rename to use dashes in file name 2018-04-11 18:11:00 +09:00
ws.c attr: remove an implicit dependency on the_index 2018-08-13 14:14:42 -07:00
wt-status.c dir.c: remove an implicit dependency on the_index in pathspec code 2018-08-13 14:14:42 -07:00
wt-status.h add status config and command line options for rename detection 2018-05-13 10:57:37 +09:00
xdiff-interface.c object-store: move object access functions to object-store.h 2018-05-16 11:42:03 +09:00
xdiff-interface.h
zlib.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00

README.md

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.

Issues which are security relevant should be disclosed privately to the Git Security mailing list git-security@googlegroups.com.

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