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Patrick Steinhardt b31e3cc620 reftable/record: store "val2" hashes as static arrays Similar to the preceding commit, convert ref records of type "val2" to store their object IDs in static arrays instead of allocating them for every single record. We're using the same benchmark as in the preceding commit, with `git show-ref --quiet` in a repository with ~350k refs. This time around though the effects aren't this huge. Before: HEAP SUMMARY: in use at exit: 21,163 bytes in 193 blocks total heap usage: 1,419,040 allocs, 1,418,847 frees, 62,153,868 bytes allocated After: HEAP SUMMARY: in use at exit: 21,163 bytes in 193 blocks total heap usage: 1,410,148 allocs, 1,409,955 frees, 61,976,068 bytes allocated This is because "val2"-type records are typically only stored for peeled tags, and the number of annotated tags in the benchmark repository is rather low. Still, it can be seen that this change leads to a reduction of allocations overall, even if only a small one. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>		2024-01-03 09:54:21 -08:00
.github	ci: upgrade to using macos-13	2023-11-03 18:52:02 +09:00
Documentation	The second batch	2023-12-18 14:10:13 -08:00
block-sha1	…
builtin	Merge branch 'ad/merge-file-diff-algo'	2023-12-18 14:10:13 -08:00
ci	Merge branch 'js/ci-discard-prove-state'	2023-12-09 16:37:48 -08:00
compat	Merge branch 'jk/fsmonitor-unused-parameter'	2023-09-29 09:04:14 -07:00
contrib	Merge branch 'tz/send-email-negatable-options'	2023-12-09 16:37:51 -08:00
ewah	…
git-gui	Merge branch 'js/update-urls-in-doc-and-comment'	2023-12-18 14:10:12 -08:00
gitk-git	doc: switch links to https	2023-11-26 10:07:05 +09:00
gitweb	Merge branch 'js/update-urls-in-doc-and-comment'	2023-12-18 14:10:12 -08:00
mergetools	…
negotiator	…
oss-fuzz	fuzz: add new oss-fuzz fuzzer for date.c / date.h	2023-11-20 08:17:51 +09:00
perl	Merge branch 'js/update-urls-in-doc-and-comment'	2023-12-18 14:10:12 -08:00
po	Merge branch 'l10n/zh-TW/2023-11-19' of github.com:l10n-tw/git-po	2023-11-20 07:57:09 +08:00
refs	refs: remove `delete_refs` callback from backends	2023-11-17 10:12:12 +09:00
reftable	reftable/record: store "val2" hashes as static arrays	2024-01-03 09:54:21 -08:00
sha1	…
sha1collisiondetection@855827c583	…
sha1dc	doc: refer to internet archive	2023-11-26 10:07:06 +09:00
sha256	…
t	Merge branch 'jh/trace2-redact-auth'	2023-12-18 14:10:13 -08:00
templates	…
trace2	…
xdiff	…
.cirrus.yml	ci: run unit tests in CI	2023-11-10 08:15:32 +09:00
.clang-format	clang-format: fix typo in comment	2023-11-01 12:24:19 +09:00
.editorconfig	…
.gitattributes	…
.gitignore	replay: introduce new builtin	2023-11-26 10:10:48 +09:00
.gitlab-ci.yml	ci: add support for GitLab CI	2023-11-09 18:56:10 +09:00
.gitmodules	…
.mailmap	mailmap: change primary address for Derrick Stolee	2023-10-12 10:59:36 -07:00
.tsan-suppressions	…
CODE_OF_CONDUCT.md	…
COPYING	…
GIT-VERSION-GEN	Start the 2.44 cycle	2023-12-09 16:37:51 -08:00
INSTALL	Merge branch 'js/update-urls-in-doc-and-comment'	2023-12-18 14:10:12 -08:00
LGPL-2.1	…
Makefile	Merge branch 'js/update-urls-in-doc-and-comment'	2023-12-18 14:10:12 -08:00
README.md	doc: switch links to https	2023-11-26 10:07:05 +09:00
RelNotes	Start the 2.44 cycle	2023-12-09 16:37:51 -08:00
SECURITY.md	…
abspath.c	…
abspath.h	…
aclocal.m4	…
add-interactive.c	…
add-interactive.h	…
add-patch.c	…
advice.c	…
advice.h	…
alias.c	…
alias.h	…
alloc.c	…
alloc.h	…
apply.c	…
apply.h	…
archive-tar.c	…
archive-zip.c	…
archive.c	…
archive.h	…
attr.c	Merge branch 'jc/attr-tree-config'	2023-10-30 07:09:55 +09:00
attr.h	attr: add attr.tree for setting the treeish to read attributes from	2023-10-13 11:43:29 -07:00
banned.h	…
base85.c	…
base85.h	…
bisect.c	…
bisect.h	…
blame.c	…
blame.h	…
blob.c	…
blob.h	…
bloom.c	commit-graph: detect out-of-order BIDX offsets	2023-10-09 15:55:02 -07:00
bloom.h	…
branch.c	…
branch.h	…
builtin.h	replay: introduce new builtin	2023-11-26 10:10:48 +09:00
bulk-checkin.c	Merge branch 'eb/limit-bulk-checkin-to-blobs'	2023-10-10 11:39:14 -07:00
bulk-checkin.h	…
bundle-uri.c	…
bundle-uri.h	…
bundle.c	…
bundle.h	…
cache-tree.c	…
cache-tree.h	…
cbtree.c	…
cbtree.h	…
chdir-notify.c	…
chdir-notify.h	…
check-builtins.sh	…
checkout.c	…
checkout.h	…
chunk-format.c	chunk-format: drop pair_chunk_unsafe()	2023-10-09 15:55:02 -07:00
chunk-format.h	chunk-format: drop pair_chunk_unsafe()	2023-10-09 15:55:02 -07:00
color.c	hex-ll: separate out non-hash-algo functions	2023-09-29 15:14:56 -07:00
color.h	…
column.c	…
column.h	…
combine-diff.c	…
command-list.txt	replay: introduce new builtin	2023-11-26 10:10:48 +09:00
commit-graph.c	Merge branch 'ps/commit-graph-less-paranoid'	2023-12-18 14:10:11 -08:00
commit-graph.h	Merge branch 'ps/do-not-trust-commit-graph-blindly-for-existence'	2023-11-08 11:03:59 +09:00
commit-reach.c	commit-reach: free temporary list in get_octopus_merge_bases()	2023-10-03 14:28:23 -07:00
commit-reach.h	…
commit-slab-decl.h	…
commit-slab-impl.h	…
commit-slab.h	…
commit.c	commit-graph: disable GIT_COMMIT_GRAPH_PARANOIA by default	2023-11-26 10:10:00 +09:00
commit.h	…
common-main.c	…
config.c	Merge branch 'jc/attr-tree-config'	2023-10-30 07:09:55 +09:00
config.h	parse: separate out parsing functions from config.h	2023-09-29 15:14:57 -07:00
config.mak.dev	…
config.mak.in	…
config.mak.uname	…
configure.ac	global: convert trivial usages of `test <expr> -a/-o <expr>`	2023-11-11 09:21:00 +09:00
connect.c	…
connect.h	…
connected.c	…
connected.h	…
convert.c	…
convert.h	…
copy.c	…
copy.h	…
credential.c	…
credential.h	…
csum-file.c	…
csum-file.h	…
ctype.c	…
daemon.c	daemon: free listen_addr before returning	2023-10-05 14:54:58 -07:00
date.c	…
date.h	…
decorate.c	decorate: add clear_decoration() function	2023-10-05 14:54:55 -07:00
decorate.h	decorate: add clear_decoration() function	2023-10-05 14:54:55 -07:00
delta-islands.c	…
delta-islands.h	…
delta.h	…
detect-compiler	…
diagnose.c	dir.[ch]: add 'follow_symlink' arg to 'get_dtype'	2023-10-09 15:53:13 -07:00
diagnose.h	…
diff-delta.c	…
diff-lib.c	Merge branch 'js/diff-cached-fsmonitor-fix' into maint-2.42	2023-11-02 16:53:19 +09:00
diff-merges.c	diff-merges: introduce '--dd' option	2023-10-09 12:47:29 -07:00
diff-merges.h	…
diff-no-index.c	Merge branch 'pw/diff-no-index-from-named-pipes' into maint-2.42	2023-11-02 16:53:18 +09:00
diff.c	Merge branch 'jk/diff-result-code-cleanup' into maint-2.42	2023-11-02 16:53:16 +09:00
diff.h	diff --stat: set the width defaults in a helper function	2023-09-29 15:46:06 -07:00
diffcore-break.c	…
diffcore-delta.c	…
diffcore-order.c	…
diffcore-pickaxe.c	…
diffcore-rename.c	…
diffcore-rotate.c	…
diffcore.h	…
dir-iterator.c	…
dir-iterator.h	…
dir.c	attr: enable attr pathspec magic for git-add and git-stash	2023-11-04 17:00:27 +09:00
dir.h	dir.[ch]: add 'follow_symlink' arg to 'get_dtype'	2023-10-09 15:53:13 -07:00
editor.c	…
editor.h	…
entry.c	wrapper: reduce scope of remove_or_warn()	2023-09-29 15:14:56 -07:00
entry.h	wrapper: reduce scope of remove_or_warn()	2023-09-29 15:14:56 -07:00
environment.c	max_tree_depth: lower it for MSVC to avoid stack overflows	2023-11-02 08:58:28 +09:00
environment.h	…
exec-cmd.c	…
exec-cmd.h	…
fetch-negotiator.c	…
fetch-negotiator.h	…
fetch-pack.c	Merge branch 'ts/unpacklimit-config-fix' into maint-2.42	2023-11-02 16:53:16 +09:00
fetch-pack.h	…
fmt-merge-msg.c	…
fmt-merge-msg.h	…
fsck.c	…
fsck.h	…
fsmonitor--daemon.h	doc: fix some typos, grammar and wording issues	2023-10-05 12:55:38 -07:00
fsmonitor-ipc.c	…
fsmonitor-ipc.h	…
fsmonitor-ll.h	…
fsmonitor-path-utils.h	…
fsmonitor-settings.c	…
fsmonitor-settings.h	…
fsmonitor.c	…
fsmonitor.h	…
generate-cmdlist.sh	…
generate-configlist.sh	…
generate-hooklist.sh	…
gettext.c	…
gettext.h	…
git-archimport.perl	perl: bump the required Perl version to 5.8.1 from 5.8.0	2023-11-17 07:26:32 +09:00
git-compat-util.h	Merge branch 'mp/rebase-label-length-limit' into maint-2.42	2023-11-02 16:53:14 +09:00
git-curl-compat.h	…
git-cvsexportcommit.perl	perl: bump the required Perl version to 5.8.1 from 5.8.0	2023-11-17 07:26:32 +09:00
git-cvsimport.perl	Merge branch 'js/update-urls-in-doc-and-comment'	2023-12-18 14:10:12 -08:00
git-cvsserver.perl	perl: bump the required Perl version to 5.8.1 from 5.8.0	2023-11-17 07:26:32 +09:00
git-difftool--helper.sh	…
git-filter-branch.sh	…
git-instaweb.sh	doc: switch links to https	2023-11-26 10:07:05 +09:00
git-merge-octopus.sh	…
git-merge-one-file.sh	…
git-merge-resolve.sh	…
git-mergetool--lib.sh	…
git-mergetool.sh	…
git-p4.py	git-p4 shouldn't attempt to store symlinks in LFS	2023-10-19 10:57:44 -07:00
git-quiltimport.sh	…
git-request-pull.sh	…
git-send-email.perl	Merge branch 'tz/send-email-negatable-options'	2023-12-09 16:37:51 -08:00
git-sh-i18n.sh	…
git-sh-setup.sh	…
git-submodule.sh	…
git-svn.perl	Merge branch 'tz/send-email-negatable-options'	2023-12-09 16:37:51 -08:00
git-web--browse.sh	…
git-zlib.c	…
git-zlib.h	…
git.c	replay: introduce new builtin	2023-11-26 10:10:48 +09:00
git.rc	…
gpg-interface.c	…
gpg-interface.h	…
graph.c	…
graph.h	doc: switch links to https	2023-11-26 10:07:05 +09:00
grep.c	…
grep.h	…
hash-ll.h	…
hash-lookup.c	…
hash-lookup.h	…
hash.h	…
hashmap.c	…
hashmap.h	…
help.c	…
help.h	…
hex-ll.c	hex-ll: separate out non-hash-algo functions	2023-09-29 15:14:56 -07:00
hex-ll.h	hex-ll: separate out non-hash-algo functions	2023-09-29 15:14:56 -07:00
hex.c	hex-ll: separate out non-hash-algo functions	2023-09-29 15:14:56 -07:00
hex.h	hex-ll: separate out non-hash-algo functions	2023-09-29 15:14:56 -07:00
hook.c	…
hook.h	…
http-backend.c	…
http-fetch.c	…
http-push.c	…
http-walker.c	…
http.c	doc: update links to current pages	2023-11-26 10:07:05 +09:00
http.h	…
ident.c	…
ident.h	…
imap-send.c	doc: switch links to https	2023-11-26 10:07:05 +09:00
iterator.h	…
json-writer.c	…
json-writer.h	doc: switch links to https	2023-11-26 10:07:05 +09:00
khash.h	…
kwset.c	doc: switch links to https	2023-11-26 10:07:05 +09:00
kwset.h	doc: switch links to https	2023-11-26 10:07:05 +09:00
levenshtein.c	…
levenshtein.h	…
line-log.c	revision: clear decoration structs during release_revisions()	2023-10-05 14:54:57 -07:00
line-log.h	revision: clear decoration structs during release_revisions()	2023-10-05 14:54:57 -07:00
line-range.c	…
line-range.h	…
linear-assignment.c	…
linear-assignment.h	…
list-objects-filter-options.c	…
list-objects-filter-options.h	…
list-objects-filter.c	…
list-objects-filter.h	…
list-objects.c	Merge branch 'tb/rev-list-unpacked-fix'	2023-11-08 15:04:42 +09:00
list-objects.h	…
list.h	doc: switch links to https	2023-11-26 10:07:05 +09:00
lockfile.c	…
lockfile.h	…
log-tree.c	…
log-tree.h	…
ls-refs.c	…
ls-refs.h	…
mailinfo.c	hex-ll: separate out non-hash-algo functions	2023-09-29 15:14:56 -07:00
mailinfo.h	…
mailmap.c	…
mailmap.h	…
match-trees.c	…
match-trees.h	…
mem-pool.c	…
mem-pool.h	…
merge-blobs.c	…
merge-blobs.h	…
merge-ll.c	…
merge-ll.h	…
merge-ort-wrappers.c	…
merge-ort-wrappers.h	…
merge-ort.c	Merge branch 'wx/merge-ort-comment-typofix' into maint-2.42	2023-11-02 16:53:27 +09:00
merge-ort.h	…
merge-recursive.c	merge: introduce {copy\|clear}_merge_options()	2023-10-11 13:37:47 -07:00
merge-recursive.h	merge: introduce {copy\|clear}_merge_options()	2023-10-11 13:37:47 -07:00
merge.c	…
merge.h	…
mergesort.h	…
midx.c	midx: check consistency of fanout table	2023-11-09 19:07:52 +09:00
midx.h	midx: check size of revindex chunk	2023-10-09 15:55:01 -07:00
name-hash.c	…
name-hash.h	…
notes-cache.c	…
notes-cache.h	…
notes-merge.c	…
notes-merge.h	…
notes-utils.c	…
notes-utils.h	…
notes.c	…
notes.h	…
object-file.c	…
object-file.h	…
object-name.c	…
object-name.h	…
object-store-ll.h	…
object-store.h	…
object.c	…
object.h	…
oid-array.c	…
oid-array.h	…
oidmap.c	…
oidmap.h	…
oidset.c	…
oidset.h	…
oidtree.c	…
oidtree.h	…
pack-bitmap-write.c	pack-bitmap-write: rebuild using new bitmap when remapping	2023-10-02 14:54:30 -07:00
pack-bitmap.c	Merge branch 'tb/rev-list-unpacked-fix'	2023-11-08 15:04:42 +09:00
pack-bitmap.h	…
pack-check.c	…
pack-mtimes.c	…
pack-mtimes.h	…
pack-objects.c	parse: separate out parsing functions from config.h	2023-09-29 15:14:57 -07:00
pack-objects.h	…
pack-revindex.c	Merge branch 'jk/chunk-bounds'	2023-10-23 13:56:36 -07:00
pack-revindex.h	…
pack-write.c	…
pack.h	…
packfile.c	…
packfile.h	packfile.c: fix a typo in `each_file_in_pack_dir_fn()`'s declaration	2023-11-20 08:15:50 +09:00
pager.c	…
pager.h	…
parallel-checkout.c	…
parallel-checkout.h	…
parse-options-cb.c	…
parse-options.c	i18n: factorize even more 'incompatible options' messages	2023-11-27 10:01:45 +09:00
parse-options.h	parse-options: make CMDMODE errors more precise	2023-10-29 09:15:18 +09:00
parse.c	parse: separate out parsing functions from config.h	2023-09-29 15:14:57 -07:00
parse.h	parse: separate out parsing functions from config.h	2023-09-29 15:14:57 -07:00
patch-delta.c	…
patch-ids.c	…
patch-ids.h	…
path.c	…
path.h	…
pathspec.c	attr: enable attr pathspec magic for git-add and git-stash	2023-11-04 17:00:27 +09:00
pathspec.h	…
pkt-line.c	…
pkt-line.h	…
preload-index.c	parse: separate out parsing functions from config.h	2023-09-29 15:14:57 -07:00
preload-index.h	…
pretty.c	pretty: fix ref filtering for %(decorate) formats	2023-10-09 11:25:13 -07:00
pretty.h	…
prio-queue.c	…
prio-queue.h	…
progress.c	parse: separate out parsing functions from config.h	2023-09-29 15:14:57 -07:00
progress.h	…
promisor-remote.c	…
promisor-remote.h	…
prompt.c	parse: separate out parsing functions from config.h	2023-09-29 15:14:57 -07:00
prompt.h	…
protocol-caps.c	…
protocol-caps.h	…
protocol.c	…
protocol.h	doc: switch links to https	2023-11-26 10:07:05 +09:00
prune-packed.c	…
prune-packed.h	…
quote.c	…
quote.h	…
range-diff.c	Merge branch 'kh/range-diff-notes'	2023-09-29 09:04:15 -07:00
range-diff.h	…
reachable.c	…
reachable.h	…
read-cache-ll.h	…
read-cache.c	…
read-cache.h	…
rebase-interactive.c	…
rebase-interactive.h	…
rebase.c	parse: separate out parsing functions from config.h	2023-09-29 15:14:57 -07:00
rebase.h	…
ref-filter.c	Merge branch 'vd/for-each-ref-unsorted-optimization'	2023-12-09 16:37:50 -08:00
ref-filter.h	ref-filter.h: add functions for filter/format & format-only	2023-11-16 14:02:59 +09:00
reflog-walk.c	…
reflog-walk.h	…
reflog.c	…
reflog.h	…
refs.c	refs: deduplicate code to delete references	2023-11-17 10:12:12 +09:00
refs.h	…
refspec.c	…
refspec.h	…
remote-curl.c	…
remote.c	…
remote.h	…
replace-object.c	…
replace-object.h	…
repo-settings.c	…
repository.c	…
repository.h	…
rerere.c	Merge branch 'jc/unresolve-removal'	2023-10-02 11:20:00 -07:00
rerere.h	…
reset.c	…
reset.h	…
resolve-undo.c	Merge branch 'jc/unresolve-removal'	2023-10-02 11:20:00 -07:00
resolve-undo.h	…
revision.c	i18n: factorize even more 'incompatible options' messages	2023-11-27 10:01:45 +09:00
revision.h	rev-list: add commit object support in `--missing` option	2023-11-01 12:07:18 +09:00
run-command.c	…
run-command.h	…
sane-ctype.h	…
scalar.c	Merge branch 'ds/scalar-updates' into maint-2.42	2023-11-02 16:53:15 +09:00
send-pack.c	…
send-pack.h	…
sequencer.c	Merge branch 'ob/sequencer-remove-dead-code' into maint-2.42	2023-11-02 16:53:24 +09:00
sequencer.h	…
serve.c	…
serve.h	…
server-info.c	…
server-info.h	…
setup.c	setup: fix leaking repository format	2023-11-07 08:51:41 +09:00
setup.h	Merge branch 'ds/scalar-updates' into maint-2.42	2023-11-02 16:53:15 +09:00
sh-i18n--envsubst.c	doc: switch links to https	2023-11-26 10:07:05 +09:00
sha1dc_git.c	…
sha1dc_git.h	…
shallow.c	shallow: fix memory leak when registering shallow roots	2023-11-07 08:51:41 +09:00
shallow.h	…
shared.mak	…
shell.c	…
shortlog.h	…
sideband.c	…
sideband.h	…
sigchain.c	…
sigchain.h	…
simple-ipc.h	…
sparse-index.c	…
sparse-index.h	…
split-index.c	…
split-index.h	…
stable-qsort.c	…
statinfo.c	Prevent git from rehashing 4GiB files	2023-10-13 13:33:35 -07:00
statinfo.h	…
strbuf.c	hex-ll: separate out non-hash-algo functions	2023-09-29 15:14:56 -07:00
strbuf.h	doc: fix some typos, grammar and wording issues	2023-10-05 12:55:38 -07:00
streaming.c	…
streaming.h	…
string-list.c	…
string-list.h	…
strmap.c	…
strmap.h	…
strvec.c	strvec: drop unnecessary include of hex.h	2023-11-03 08:26:55 +09:00
strvec.h	…
sub-process.c	…
sub-process.h	…
submodule-config.c	…
submodule-config.h	…
submodule.c	…
submodule.h	…
symlinks.c	…
symlinks.h	…
tag.c	…
tag.h	…
tar.h	…
tempfile.c	…
tempfile.h	…
thread-utils.c	…
thread-utils.h	…
tmp-objdir.c	…
tmp-objdir.h	…
trace.c	doc: switch links to https	2023-11-26 10:07:05 +09:00
trace.h	…
trace2.c	trace2: redact passwords from https:// URLs by default	2023-11-23 10:30:33 +09:00
trace2.h	trace2: fix signature of trace2_def_param() macro	2023-11-23 10:30:32 +09:00
trailer.c	…
trailer.h	…
transport-helper.c	…
transport-internal.h	…
transport.c	…
transport.h	…
tree-diff.c	…
tree-walk.c	…
tree-walk.h	…
tree.c	…
tree.h	…
unicode-width.h	…
unimplemented.sh	…
unix-socket.c	…
unix-socket.h	…
unix-stream-server.c	…
unix-stream-server.h	…
unpack-trees.c	Merge branch 'cw/prelim-cleanup'	2023-10-10 11:39:14 -07:00
unpack-trees.h	…
upload-pack.c	Merge branch 'ds/upload-pack-error-sequence-fix' into maint-2.42	2023-11-02 16:53:20 +09:00
upload-pack.h	…
url.c	hex-ll: separate out non-hash-algo functions	2023-09-29 15:14:56 -07:00
url.h	…
urlmatch.c	hex-ll: separate out non-hash-algo functions	2023-09-29 15:14:56 -07:00
urlmatch.h	…
usage.c	…
userdiff.c	…
userdiff.h	…
utf8.c	doc: switch links to https	2023-11-26 10:07:05 +09:00
utf8.h	doc: switch links to https	2023-11-26 10:07:05 +09:00
varint.c	…
varint.h	…
version.c	…
version.h	…
versioncmp.c	…
versioncmp.h	…
walker.c	…
walker.h	…
wildmatch.c	…
wildmatch.h	…
worktree.c	…
worktree.h	…
wrap-for-bin.sh	…
wrapper.c	parse: separate out parsing functions from config.h	2023-09-29 15:14:57 -07:00
wrapper.h	wrapper: reduce scope of remove_or_warn()	2023-09-29 15:14:56 -07:00
write-or-die.c	parse: separate out parsing functions from config.h	2023-09-29 15:14:57 -07:00
write-or-die.h	…
ws.c	…
ws.h	…
wt-status.c	Merge branch 'jk/diff-result-code-cleanup' into maint-2.42	2023-11-02 16:53:16 +09:00
wt-status.h	…
xdiff-interface.c	…
xdiff-interface.h	…

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-<commandname>.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 and Documentation/CodingGuidelines).

Those wishing to help with error message, usage and informational message string translations (localization l10) should see po/README.md (a po file is a Portable Object file that holds the translations).

To subscribe to the list, send an email with just "subscribe git" in the body to majordomo@vger.kernel.org (not the Git list). The mailing list archives are available at https://lore.kernel.org/git/, https://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