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Julian Phillips e9c4c11165 refs: Use binary search to lookup refs faster
Currently we linearly search through lists of refs when we need to
find a specific ref.  This can be very slow if we need to lookup a
large number of refs.  By changing to a binary search we can make this
faster.

In order to be able to use a binary search we need to change from
using linked lists to arrays, which we can manage using ALLOC_GROW.

We can now also use the standard library qsort function to sort the
refs arrays.

Signed-off-by: Julian Phillips <julian@quantumfyre.co.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-09-30 12:28:34 -07:00
block-sha1
builtin Merge branch 'ak/describe-exact' into maint 2011-01-19 08:25:52 -08:00
compat Merge branch 'rj/msvc-fix' 2010-12-16 12:55:36 -08:00
contrib Merge branch 'pd/bash-4-completion' 2010-12-22 14:40:55 -08:00
Documentation Git 1.7.4 2011-01-30 19:02:37 -08:00
git-gui
git_remote_helpers
gitk-git Merge branch 'maint' 2011-01-08 23:48:47 -08:00
gitweb Don't pass "--xhtml" to hightlight in gitweb.perl script. 2011-01-27 12:13:07 -08:00
perl
ppc
t Merge branch 'maint' 2011-01-27 10:27:49 -08:00
templates
vcs-svn svndump.c: Fix a printf format compiler warning 2011-01-18 16:48:47 -08:00
xdiff Merge branch 'cb/diff-fname-optim' into maint 2010-11-24 12:46:26 -08:00
.gitattributes
.gitignore Merge branch 'nd/setup' 2010-12-28 11:26:55 -08:00
.mailmap
abspath.c
aclocal.m4
advice.c
advice.h
alias.c
alloc.c
archive-tar.c
archive-zip.c
archive.c
archive.h
attr.c
attr.h
base85.c
bisect.c
bisect.h
blob.c
blob.h
branch.c
branch.h
builtin.h Merge branch 'il/remote-fd-ext' 2010-12-08 11:24:14 -08:00
bundle.c
bundle.h
cache-tree.c
cache-tree.h
cache.h Merge branch 'nd/setup' 2010-12-28 11:26:55 -08:00
check-builtins.sh
check-racy.c
check_bindir
color.c default color.status.branch to "same as header" 2010-12-10 12:59:52 -08:00
color.h default color.status.branch to "same as header" 2010-12-10 12:59:52 -08:00
combine-diff.c
command-list.txt
commit.c Merge branch 'tf/commit-list-prefix' 2010-12-22 14:40:17 -08:00
commit.h Merge branch 'tf/commit-list-prefix' 2010-12-22 14:40:17 -08:00
config.c Merge branch 'nd/setup' 2010-12-28 11:26:55 -08:00
config.mak.in Merge branch 'jk/asciidoc-update' 2010-12-12 21:49:51 -08:00
configure.ac Merge branch 'jk/asciidoc-update' 2010-12-12 21:49:51 -08:00
connect.c
convert.c convert filter: supply path to external driver 2010-12-22 10:19:32 -08:00
copy.c
COPYING
csum-file.c
csum-file.h
ctype.c
daemon.c daemon: support <directory> arguments again 2011-01-04 11:23:42 -08:00
date.c
decorate.c
decorate.h
delta.h
diff-delta.c
diff-lib.c
diff-no-index.c
diff.c Merge branch 'ks/blame-worktree-textconv-cached' 2010-12-21 14:30:52 -08:00
diff.h
diffcore-break.c
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c
diffcore-rename.c
diffcore.h
dir.c Merge branch 'nd/maint-relative' into maint 2011-01-19 08:25:31 -08:00
dir.h Merge branch 'nd/maint-fix-add-typo-detection' 2010-12-22 14:40:26 -08:00
editor.c
entry.c entry.c: remove "checkout-index" from error messages 2010-11-29 14:03:07 -08:00
environment.c Merge branch 'nd/setup' 2010-12-28 11:26:55 -08:00
exec_cmd.c exec_cmd: remove unused extern 2011-01-19 08:27:22 -08:00
exec_cmd.h
fast-import.c Merge branch 'maint' 2011-01-27 10:27:49 -08:00
fetch-pack.h
fixup-builtins
fsck.c
fsck.h
generate-cmdlist.sh
git-add--interactive.perl Merge branch 'jl/add-p-reverse-message' into maint 2010-12-09 10:36:47 -08:00
git-am.sh Merge branch 'jc/maint-rebase-rewrite-last-skip' into maint 2010-12-28 13:43:10 -08:00
git-archimport.perl
git-bisect.sh
git-compat-util.h Merge branch 'jn/thinner-wrapper' 2010-12-03 16:13:06 -08:00
git-cvsexportcommit.perl
git-cvsimport.perl Merge branch 'mg/cvsimport' 2011-01-05 13:30:29 -08:00
git-cvsserver.perl
git-difftool--helper.sh difftool: provide basename to external tools 2010-12-16 13:01:36 -08:00
git-difftool.perl difftool: Fix failure on Cygwin 2010-12-14 11:13:41 -08:00
git-filter-branch.sh
git-instaweb.sh
git-lost-found.sh
git-merge-octopus.sh
git-merge-one-file.sh
git-merge-resolve.sh
git-mergetool--lib.sh
git-mergetool.sh
git-parse-remote.sh Merge branch 'mz/pull-rebase-rebased' 2010-12-12 21:49:51 -08:00
git-pull.sh Merge branch 'jl/fetch-submodule-recursive' 2010-12-16 12:57:15 -08:00
git-quiltimport.sh
git-rebase--interactive.sh Merge branch 'maint' 2011-01-27 10:27:49 -08:00
git-rebase.sh Merge branch 'maint' 2011-01-27 10:27:49 -08:00
git-relink.perl Merge branch 'ab/require-perl-5.8' into maint 2010-12-09 10:35:21 -08:00
git-remote-testgit.py
git-repack.sh Merge branch 'tr/maint-git-repack-tmpfile' into maint 2010-11-24 12:47:10 -08:00
git-request-pull.sh
git-send-email.perl Merge branch 'ab/require-perl-5.8' into maint 2010-12-09 10:35:21 -08:00
git-sh-setup.sh
git-stash.sh
git-submodule.sh Merge branch 'tr/submodule-relative-scp-url' into maint 2011-01-19 08:26:41 -08:00
git-svn.perl git-svn: allow the mergeinfo property to be set 2010-12-10 04:09:48 +08:00
GIT-VERSION-GEN Git 1.7.4 2011-01-30 19:02:37 -08:00
git-web--browse.sh web--browse: better support for chromium 2010-12-03 14:05:32 -08:00
git.c Merge branch 'nd/setup' 2010-12-28 11:26:55 -08:00
git.spec.in
graph.c
graph.h
grep.c
grep.h
hash.c
hash.h
help.c help: always suggest common-cmds if prefix of cmd 2010-12-05 12:15:12 -08:00
help.h
hex.c
http-backend.c http-backend: use end_url_with_slash() 2010-11-26 14:50:45 -08:00
http-fetch.c http-fetch: rework url handling 2010-11-26 14:50:46 -08:00
http-push.c http-push: add trailing slash at arg-parse time, instead of later on 2010-11-26 14:50:46 -08:00
http-walker.c
http.c Merge branch 'tc/http-urls-ends-with-slash' into maint 2010-12-14 07:36:10 -08:00
http.h shift end_url_with_slash() from http.[ch] to url.[ch] 2010-11-26 14:50:45 -08:00
ident.c ident: die on bogus date format 2010-12-20 10:28:19 -08:00
imap-send.c
INSTALL docs: default to more modern toolset 2010-11-24 15:13:58 -08:00
levenshtein.c
levenshtein.h
list-objects.c
list-objects.h
ll-merge.c ll-merge: simplify opts == NULL case 2011-01-15 20:34:14 -08:00
ll-merge.h
lockfile.c
log-tree.c
log-tree.h
mailmap.c
mailmap.h
Makefile Merge branch 'nd/setup' 2010-12-28 11:26:55 -08:00
match-trees.c
merge-file.c
merge-recursive.c Merge branch 'en/merge-recursive' 2010-11-29 17:52:35 -08:00
merge-recursive.h
name-hash.c
notes-cache.c
notes-cache.h
notes-merge.c
notes-merge.h
notes.c Merge branch 'jh/notes-merge' 2010-12-08 11:24:12 -08:00
notes.h Merge branch 'jh/notes-merge' 2010-12-08 11:24:12 -08:00
object.c
object.h
pack-check.c
pack-refs.c
pack-refs.h
pack-revindex.c
pack-revindex.h
pack-write.c
pack.h
pager.c
parse-options.c parse-options: make resuming easier after PARSE_OPT_STOP_AT_NON_OPTION 2010-12-07 14:19:32 -08:00
parse-options.h Merge branch 'jn/parse-options-extra' 2010-12-12 21:49:53 -08:00
patch-delta.c
patch-ids.c
patch-ids.h
path.c
pkt-line.c
pkt-line.h
preload-index.c
pretty.c
progress.c
progress.h
quote.c
quote.h
reachable.c
reachable.h
read-cache.c Merge branch 'jj/icase-directory' 2010-12-03 16:10:34 -08:00
README
reflog-walk.c Merge branch 'jk/maint-reflog-bottom' into maint 2010-12-14 07:35:50 -08:00
reflog-walk.h
refs.c refs: Use binary search to lookup refs faster 2011-09-30 12:28:34 -07:00
refs.h
RelNotes Prepare for 1.7.3.5 2010-12-28 13:48:54 -08:00
remote-curl.c
remote.c
remote.h
replace_object.c
rerere.c
rerere.h
resolve-undo.c
resolve-undo.h
revision.c Merge branch 'tf/commit-list-prefix' 2010-12-22 14:40:17 -08:00
revision.h
run-command.c
run-command.h
send-pack.h
server-info.c
setup.c Subject: setup: officially support --work-tree without --git-dir 2011-01-21 14:31:24 -08:00
sha1-lookup.c
sha1-lookup.h
sha1_file.c Correctly report corrupted objects 2011-01-20 13:18:51 -08:00
sha1_name.c Merge branch 'tf/commit-list-prefix' 2010-12-22 14:40:17 -08:00
shallow.c
shell.c
shortlog.h
show-index.c
sideband.c
sideband.h
sigchain.c
sigchain.h
strbuf.c
strbuf.h
string-list.c
string-list.h
submodule.c fetch_populated_submodules(): document dynamic allocation 2010-12-09 23:42:05 -08:00
submodule.h
symlinks.c do not overwrite files in leading path 2010-12-14 08:55:12 -08:00
tag.c
tag.h
tar.h
test-chmtime.c
test-ctype.c
test-date.c
test-delta.c
test-dump-cache-tree.c
test-genrandom.c
test-index-version.c
test-line-buffer.c
test-match-trees.c
test-obj-pool.c
test-parse-options.c
test-path-utils.c
test-run-command.c
test-sha1.c
test-sha1.sh
test-sigchain.c
test-string-pool.c
test-subprocess.c setup_work_tree: adjust relative $GIT_WORK_TREE after moving cwd 2010-12-27 08:34:19 -08:00
test-svn-fe.c
test-treap.c treap: make treap_insert return inserted node 2010-12-07 16:03:55 -08:00
thread-utils.c
thread-utils.h thread-utils.h: simplify the inclusion 2010-12-10 12:58:06 -08:00
trace.c trace.c: ensure NULL is not passed to printf 2011-01-06 12:21:49 -08:00
transport-helper.c thread-utils.h: simplify the inclusion 2010-12-10 12:58:06 -08:00
transport.c
transport.h
tree-diff.c
tree-walk.c
tree-walk.h
tree.c
tree.h
unimplemented.sh
unpack-trees.c Merge branch 'nd/maint-fix-add-typo-detection' 2010-12-22 14:40:26 -08:00
unpack-trees.h use persistent memory for rejected paths 2010-12-14 08:55:13 -08:00
upload-pack.c commit: Add commit_list prefix in two function names. 2010-11-29 14:01:52 -08:00
url.c url: add str wrapper for end_url_with_slash() 2010-11-26 14:50:45 -08:00
url.h url: add str wrapper for end_url_with_slash() 2010-11-26 14:50:45 -08:00
usage.c
userdiff.c Merge branch 'as/userdiff-pascal' 2011-01-24 10:54:12 -08:00
userdiff.h
utf8.c
utf8.h
walker.c commit: Add commit_list prefix in two function names. 2010-11-29 14:01:52 -08:00
walker.h
wrap-for-bin.sh
wrapper.c set_try_to_free_routine(NULL) means "do nothing special" 2010-12-21 09:25:14 -08:00
write_or_die.c
ws.c Make the tab width used for whitespace checks configurable 2010-12-01 14:47:51 -08:00
wt-status.c Merge branch 'aa/status-hilite-branch' 2010-12-16 12:50:03 -08:00
wt-status.h status: show branchname with a configurable color 2010-11-29 16:31:34 -08:00
xdiff-interface.c Merge branch 'rs/maint-diff-fd-leak' into maint 2010-12-26 11:18:39 -08:00
xdiff-interface.h
zlib.c

////////////////////////////////////////////////////////////////

	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/gittutorial.txt to get started, then see
Documentation/everyday.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).

Many Git online resources are accessible from http://git-scm.com/
including full documentation and Git related tools.

The user discussion and development of Git take place on the Git
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to the list, send an email with just "subscribe git" in the body to
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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
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remaining tasks.