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Jeff King 16445242ed fetch-pack: avoid quadratic list insertion in mark_complete
We insert the commit pointed to by each ref one-by-one into
the "complete" commit_list using insert_by_date. Because
each insertion is O(n), we end up with O(n^2) behavior.

This typically doesn't matter, because the number of refs is
reasonably small. And even if there are a lot of refs, they
often point to a smaller set of objects (in which case the
optimization in commit ea5f220 keeps our "n" small).

However, in pathological repositories (hundreds of thousands
of refs, each pointing to a unique commit), this quadratic
behavior can make a difference. Since we do not care about
the list order until we have finished building it, we can
simply keep it unsorted during the insertion phase, then
sort it afterwards.

On a repository like the one described above, this dropped
the time to do a no-op fetch from 2.0s to 1.7s. On normal
repositories, it probably does not matter at all, but it
does not hurt to protect ourselves from pathological cases.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-02 12:03:34 -07:00
block-sha1
builtin Merge branch 'jc/topo-author-date-sort' 2013-07-01 12:41:23 -07:00
compat Merge branch 'fc/macos-x-clipped-write' into maint 2013-06-30 15:33:40 -07:00
contrib Merge branch 'fc/show-branch-in-rebase-am' into maint 2013-06-27 14:38:16 -07:00
Documentation Merge branch 'jc/topo-author-date-sort' 2013-07-01 12:41:23 -07:00
git-gui git-gui 0.18.0 2013-06-16 20:06:55 -07:00
git_remote_helpers
gitk-git Merge git://ozlabs.org/~paulus/gitk 2013-05-17 11:55:02 -07:00
gitweb gitweb: fix problem causing erroneous project list 2013-06-07 09:37:16 -07:00
mergetools Sync with v1.8.2.3 2013-05-09 13:32:54 -07:00
perl git-svn: added an --include-path flag 2013-05-09 01:13:36 +00:00
po gitk: Update Swedish translation (304t) 2013-05-17 09:25:25 +10:00
ppc
t Merge branch 'jc/topo-author-date-sort' 2013-07-01 12:41:23 -07:00
templates pre-push.sample: Make the script executable 2013-06-11 11:22:00 -07:00
vcs-svn
xdiff diff: add --ignore-blank-lines option 2013-06-19 15:17:45 -07:00
.gitattributes
.gitignore Merge branch 'jc/topo-author-date-sort' 2013-07-01 12:41:23 -07:00
.mailmap
abspath.c mingw: rename WIN32 cpp macro to GIT_WINDOWS_NATIVE 2013-05-08 12:14:35 -07:00
aclocal.m4
advice.c Merge branch 'mm/rm-coalesce-errors' 2013-06-24 13:48:35 -07:00
advice.h Merge branch 'mm/rm-coalesce-errors' 2013-06-24 13:48:35 -07:00
alias.c
alloc.c
archive-tar.c
archive-zip.c Merge branch 'sb/archive-zip-double-assignment-fix' 2013-06-06 12:19:04 -07:00
archive.c
archive.h
argv-array.c
argv-array.h
attr.c
attr.h
base85.c
bisect.c register_ref(): make a copy of the bad reference SHA-1 2013-06-02 15:28:47 -07:00
bisect.h
blob.c
blob.h
branch.c Merge branch 'jh/checkout-auto-tracking' into maint 2013-06-27 14:37:21 -07:00
branch.h
builtin.h Merge branch 'jh/libify-note-handling' 2013-06-24 13:48:30 -07:00
bulk-checkin.c
bulk-checkin.h
bundle.c object_array_entry: fix memory handling of the name field 2013-06-02 15:28:46 -07:00
bundle.h
cache-tree.c
cache-tree.h
cache.h Merge branch 'mh/ref-races' 2013-06-30 15:40:05 -07:00
check-builtins.sh
check-racy.c
check_bindir
color.c make color.ui default to 'auto' 2013-06-10 10:55:42 -07:00
color.h
column.c
column.h
combine-diff.c Merge branch 'mk/combine-diff-context-horizon-fix' into maint 2013-06-27 14:37:56 -07:00
command-list.txt
commit-slab.h commit-slab: introduce a macro to define a slab for new type 2013-06-07 10:02:12 -07:00
commit.c Merge branch 'jc/topo-author-date-sort' 2013-07-01 12:41:23 -07:00
commit.h Merge branch 'jc/topo-author-date-sort' 2013-07-01 12:41:23 -07:00
config.c Merge branch 'nd/traces' 2013-06-20 16:02:28 -07:00
config.mak.in
config.mak.uname Merge branch 'fc/macos-x-clipped-write' into maint 2013-06-30 15:33:40 -07:00
configure.ac configure: fix option help message for --disable-pthreads 2013-06-28 10:49:26 -07:00
connect.c Merge branch 'nd/clone-local-with-colon' 2013-06-02 15:52:22 -07:00
connected.c clone: open a shortcut for connectivity check 2013-05-28 08:07:20 -07:00
connected.h clone: open a shortcut for connectivity check 2013-05-28 08:07:20 -07:00
convert.c
convert.h
copy.c
COPYING
credential-cache--daemon.c
credential-cache.c
credential-store.c
credential.c
credential.h
csum-file.c
csum-file.h
ctype.c
daemon.c
date.c Merge branch 'jc/prune-all' 2013-05-29 14:23:04 -07:00
decorate.c decorate.c: compact table when growing 2013-05-16 11:51:08 -07:00
decorate.h
delta.h
diff-delta.c
diff-lib.c diff-lib, read-tree, unpack-trees: mark cache_entry array paramters const 2013-06-02 15:31:14 -07:00
diff-no-index.c mingw: rename WIN32 cpp macro to GIT_WINDOWS_NATIVE 2013-05-08 12:14:35 -07:00
diff.c diff: add --ignore-blank-lines option 2013-06-19 15:17:45 -07:00
diff.h
diffcore-break.c
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c diffcore-pickaxe: make error messages more consistent 2013-06-03 10:50:22 -07:00
diffcore-rename.c
diffcore.h
dir.c Merge branch 'jn/config-ignore-inaccessible' into maint 2013-06-09 17:06:56 -07:00
dir.h
editor.c
entry.c
environment.c core: use env variable instead of config var to turn on logging pack access 2013-06-09 16:07:50 -07:00
exec_cmd.c
exec_cmd.h
fast-import.c Merge branch 'fc/fast-export-persistent-marks' 2013-06-02 15:48:28 -07:00
fetch-pack.c fetch-pack: avoid quadratic list insertion in mark_complete 2013-07-02 12:03:34 -07:00
fetch-pack.h clone: open a shortcut for connectivity check 2013-05-28 08:07:20 -07:00
fixup-builtins
fmt-merge-msg.h
fsck.c
fsck.h
generate-cmdlist.sh
gettext.c
gettext.h
git-add--interactive.perl add -i: add extra options at the right place in "diff" command line 2013-06-23 13:39:39 -07:00
git-am.sh am: handle stray $dotest directory 2013-06-17 08:59:48 -07:00
git-archimport.perl
git-bisect.sh bisect: Fix log output for multi-parent skip ranges 2013-05-22 15:40:43 -07:00
git-compat-util.h Merge branch 'fc/macos-x-clipped-write' into maint 2013-06-30 15:33:40 -07:00
git-cvsexportcommit.perl
git-cvsimport.perl
git-cvsserver.perl
git-difftool--helper.sh
git-difftool.perl difftool --dir-diff: allow changing any clean working tree file 2013-05-29 12:50:08 -07:00
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 mergetool--lib: refactor {diff,merge}_cmd logic 2013-06-17 13:12:55 -07:00
git-mergetool.sh
git-p4.py Merge branch 'vl/typofix' 2013-06-26 15:07:52 -07:00
git-parse-remote.sh
git-pull.sh Merge branch 'jk/pull-into-dirty-unborn' 2013-06-27 14:29:52 -07:00
git-quiltimport.sh
git-rebase--am.sh am: return control to caller, for housekeeping 2013-05-12 23:20:07 -07:00
git-rebase--interactive.sh rebase -i: return control to caller, for housekeeping 2013-05-12 23:20:07 -07:00
git-rebase--merge.sh rebase --merge: return control to caller, for housekeeping 2013-05-12 23:20:08 -07:00
git-rebase.sh Merge branch 'rr/rebase-stash-store' 2013-06-27 14:29:41 -07:00
git-relink.perl
git-remote-testgit.sh Merge branch 'js/transport-helper-error-reporting-fix' into fc/makefile 2013-06-07 16:15:32 -07:00
git-remote-testpy.py
git-repack.sh
git-request-pull.sh
git-send-email.perl Merge branch 'mt/send-email-cc-match-fix' 2013-06-27 14:29:57 -07:00
git-sh-i18n.sh
git-sh-setup.sh sh-setup: add new peel_committish() helper 2013-06-14 09:41:03 -07:00
git-stash.sh stash: introduce 'git stash store' 2013-06-17 11:43:13 -07:00
git-submodule.sh Merge branch 'jk/submodule-subdirectory-ok' 2013-06-30 15:39:35 -07:00
git-svn.perl Merge branch 'vl/typofix' 2013-06-26 15:07:52 -07:00
GIT-VERSION-GEN Git 1.8.3.2 2013-06-28 14:56:30 -07:00
git-web--browse.sh web--browse: support /usr/bin/cygstart on Cygwin 2013-06-21 09:05:15 -07:00
git.c Merge branch 'nd/clone-connectivity-shortcut' 2013-06-06 12:17:55 -07:00
git.rc Provide a Windows version resource for the git executables. 2013-06-04 10:11:08 +01:00
git.spec.in
gpg-interface.c
gpg-interface.h
graph.c
graph.h
grep.c
grep.h
hash.c
hash.h
help.c Merge branch 'rj/mingw-cygwin' 2013-06-11 13:30:20 -07:00
help.h help: add help_unknown_ref() 2013-05-08 15:31:54 -07:00
hex.c
http-backend.c show_head_ref(): rename first parameter to "refname" 2013-06-02 15:28:47 -07:00
http-fetch.c
http-push.c
http-walker.c
http.c Merge branch 'bc/http-keep-memory-given-to-curl' 2013-06-27 14:29:49 -07:00
http.h
ident.c
imap-send.c imap-send: eliminate HMAC deprecation warnings on Mac OS X 2013-05-21 13:26:37 -07:00
INSTALL
kwset.c
kwset.h
levenshtein.c
levenshtein.h
LGPL-2.1
line-log.c
line-log.h
line-range.c
line-range.h
list-objects.c
list-objects.h
ll-merge.c
ll-merge.h
lockfile.c
log-tree.c Merge branch 'tr/line-log' 2013-06-02 16:00:44 -07:00
log-tree.h
mailmap.c
mailmap.h
Makefile Merge branch 'jc/topo-author-date-sort' 2013-07-01 12:41:23 -07:00
match-trees.c match-trees: factor out fill_tree_desc_strict 2013-06-13 14:45:38 -07:00
merge-blobs.c
merge-blobs.h
merge-recursive.c
merge-recursive.h
merge.c
mergesort.c
mergesort.h
name-hash.c
notes-cache.c
notes-cache.h
notes-merge.c Move create_notes_commit() from notes-merge.c into notes-utils.c 2013-06-12 10:38:13 -07:00
notes-merge.h Move create_notes_commit() from notes-merge.c into notes-utils.c 2013-06-12 10:38:13 -07:00
notes-utils.c Move create_notes_commit() from notes-merge.c into notes-utils.c 2013-06-12 10:38:13 -07:00
notes-utils.h Move create_notes_commit() from notes-merge.c into notes-utils.c 2013-06-12 10:38:13 -07:00
notes.c string_list_add_refs_by_glob(): add a comment about memory management 2013-06-02 15:28:47 -07:00
notes.h
object.c Merge branch 'mh/reflife' 2013-06-14 08:46:14 -07:00
object.h object_array_entry: fix memory handling of the name field 2013-06-02 15:28:46 -07:00
pack-check.c
pack-revindex.c
pack-revindex.h
pack-write.c
pack.h
pager.c
parse-options-cb.c
parse-options.c
parse-options.h Merge branch 'jc/prune-all' 2013-05-29 14:23:04 -07:00
patch-delta.c
patch-ids.c
patch-ids.h
path.c
pathspec.c
pathspec.h
pkt-line.c
pkt-line.h
preload-index.c
pretty.c Merge branch 'rs/pp-user-info-without-extra-allocation' 2013-05-01 15:24:08 -07:00
prio-queue.c sort-in-topological-order: use prio-queue 2013-06-11 15:15:21 -07:00
prio-queue.h sort-in-topological-order: use prio-queue 2013-06-11 15:15:21 -07:00
progress.c
progress.h
prompt.c
prompt.h
quote.c
quote.h
reachable.c
reachable.h
read-cache.c Merge branch 'mh/ref-races' 2013-06-30 15:40:05 -07:00
README
reflog-walk.c
reflog-walk.h
refs.c Merge branch 'mh/ref-races' 2013-06-30 15:40:05 -07:00
refs.h refs: implement simple transactions for the packed-refs file 2013-06-20 15:50:17 -07:00
RelNotes Start preparing for 1.8.3.3 2013-06-30 15:36:03 -07:00
remote-curl.c
remote-testsvn.c
remote.c remote: trivial style cleanup 2013-05-28 09:03:00 -07:00
remote.h
replace_object.c
rerere.c
rerere.h
resolve-undo.c
resolve-undo.h
revision.c Merge branch 'jc/topo-author-date-sort' 2013-07-01 12:41:23 -07:00
revision.h Merge branch 'jc/topo-author-date-sort' 2013-07-01 12:41:23 -07:00
run-command.c mingw: rename WIN32 cpp macro to GIT_WINDOWS_NATIVE 2013-05-08 12:14:35 -07:00
run-command.h
send-pack.c
send-pack.h
sequencer.c Merge branch 'rr/cherry-pick-fast-forward-reflog-message' 2013-06-27 14:30:00 -07:00
sequencer.h
server-info.c
setup.c
sh-i18n--envsubst.c
sha1-array.c
sha1-array.h
sha1-lookup.c
sha1-lookup.h
sha1_file.c Merge branch 'jk/unpack-entry-fallback-to-another' 2013-06-23 14:53:20 -07:00
sha1_name.c Merge branch 'fc/at-head' 2013-06-11 13:31:23 -07:00
shallow.c fetch-pack: prepare updated shallow file before fetching the pack 2013-05-28 08:06:08 -07:00
shell.c
shortlog.h
show-index.c
sideband.c
sideband.h
sigchain.c
sigchain.h
strbuf.c
strbuf.h
streaming.c
streaming.h
string-list.c
string-list.h
submodule.c Merge branch 'mh/reflife' 2013-06-14 08:46:14 -07:00
submodule.h
symlinks.c
tag.c
tag.h
tar.h
test-chmtime.c Merge branch 'js/test-ln-s-add' 2013-06-20 16:02:18 -07:00
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-mergesort.c
test-mktemp.c
test-parse-options.c
test-path-utils.c
test-prio-queue.c prio-queue: priority queue of pointers to structs 2013-06-11 15:15:21 -07:00
test-read-cache.c read-cache: add simple performance test 2013-06-09 17:03:00 -07:00
test-regex.c
test-revision-walking.c
test-run-command.c
test-scrap-cache-tree.c
test-sha1.c
test-sha1.sh
test-sigchain.c
test-string-list.c
test-subprocess.c
test-svn-fe.c
test-wildmatch.c
thread-utils.c mingw: rename WIN32 cpp macro to GIT_WINDOWS_NATIVE 2013-05-08 12:14:35 -07:00
thread-utils.h
trace.c
transport-helper.c transport-helper: be quiet on read errors from helpers 2013-06-21 09:03:53 -07:00
transport.c Merge branch 'ph/builtin-srcs-are-in-subdir-these-days' 2013-06-26 15:07:48 -07:00
transport.h Merge branch 'ph/builtin-srcs-are-in-subdir-these-days' 2013-06-26 15:07:48 -07:00
tree-diff.c
tree-walk.c
tree-walk.h unpack-trees: don't shift conflicts left and right 2013-06-17 09:24:47 -07:00
tree.c
tree.h
unimplemented.sh
unix-socket.c
unix-socket.h
unpack-trees.c Merge branch 'rs/unpack-trees-tree-walk-conflict-field' 2013-06-24 13:48:44 -07:00
unpack-trees.h diff-lib, read-tree, unpack-trees: mark cache_entry array paramters const 2013-06-02 15:31:14 -07:00
upload-pack.c
url.c
url.h
usage.c
userdiff.c
userdiff.h
utf8.c
utf8.h
varint.c
varint.h
version.c
version.h
walker.c
walker.h
wildmatch.c wildmatch: properly fold case everywhere 2013-06-02 14:13:05 -07:00
wildmatch.h
wrap-for-bin.sh
wrapper.c
write_or_die.c
ws.c
wt-status.c wt-status: give better advice when cherry-pick is in progress 2013-06-17 13:16:26 -07:00
wt-status.h
xdiff-interface.c
xdiff-interface.h
zlib.c

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

	Git - the stupid content tracker

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

"git" can mean anything, depending on your mood.

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