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Jeff King b74cf64803 for-each-ref: avoid loading objects to print %(objectname)
If you ask for-each-ref to print each ref and its object,
like:

  git for-each-ref --format='%(objectname) %(refname)'

this should involve little more work than looking at the ref
files (and packed-refs) themselves. However, for-each-ref
will actually load each object from disk just to print its
sha1. For most repositories, this isn't a big deal, but it
can be noticeable if you have a large number of refs to
print. Here are best-of-five timings for the command above
on a repo with ~10K refs:

  [before]
  real    0m0.112s
  user    0m0.092s
  sys     0m0.016s

  [after]
  real    0m0.014s
  user    0m0.012s
  sys     0m0.000s

This patch checks for %(objectname) and %(objectname:short)
before we actually parse the object (and the rest of the
code is smart enough to avoid parsing if we have filled all
of our placeholders).

Note that we can't simply move the objectname parsing code
into the early loop. If the "deref" form %(*objectname) is
used, then we do need to parse the object in order to peel
the tag. So instead of moving the code, we factor it out
into a separate function that can be called for both cases.

While we're at it, we add some basic tests for the
dereferenced placeholders, which were not tested at all
before. This helps ensure we didn't regress that case.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-10-30 10:33:46 -07:00
block-sha1
builtin for-each-ref: avoid loading objects to print %(objectname) 2013-10-30 10:33:46 -07:00
compat Merge branch 'rj/cygwin-clarify-use-of-cheating-lstat' 2013-08-02 11:01:01 -07:00
contrib git-remote-mediawiki: ignore generated git-mw 2013-08-13 09:52:22 -07:00
Documentation Git 1.8.4 2013-08-23 11:49:46 -07:00
git_remote_helpers
git-gui git-gui 0.18.0 2013-06-16 20:06:55 -07:00
gitk-git
gitweb gitweb: allow extra breadcrumbs to prefix the trail 2013-07-04 21:52:15 -07:00
mergetools
perl
po l10n: Add reference for french translation team 2013-08-11 17:14:58 +02:00
ppc
t for-each-ref: avoid loading objects to print %(objectname) 2013-10-30 10:33:46 -07:00
templates templates: spell ASCII in uppercase in pre-commit hook 2013-07-15 09:52:57 -07:00
vcs-svn
xdiff diff: add --ignore-blank-lines option 2013-06-19 15:17:45 -07:00
.gitattributes
.gitignore Merge branch 'es/check-mailmap' 2013-07-22 11:24:14 -07:00
.mailmap Merge branch 'sb/mailmap-updates' 2013-08-13 10:49:33 -07:00
abspath.c
aclocal.m4
advice.c Rename advice.object_name_warning to objectNameWarning 2013-07-31 15:20:07 -07:00
advice.h Merge branch 'jk/gcc-function-attributes' 2013-07-22 11:23:59 -07:00
alias.c
alloc.c
archive-tar.c
archive-zip.c Merge branch 'sb/archive-zip-double-assignment-fix' into maint 2013-07-19 10:40:53 -07:00
archive.c
archive.h
argv-array.c
argv-array.h Add the LAST_ARG_MUST_BE_NULL macro 2013-07-19 09:26:15 -07:00
attr.c
attr.h
base85.c
bisect.c
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 builtin: add git-check-mailmap command 2013-07-13 10:19:37 -07:00
bulk-checkin.c
bulk-checkin.h
bundle.c
bundle.h
cache-tree.c Convert "struct cache_entry *" to "const ..." wherever possible 2013-07-09 09:12:48 -07:00
cache-tree.h Convert "struct cache_entry *" to "const ..." wherever possible 2013-07-09 09:12:48 -07:00
cache.h Merge branch 'ob/typofixes' 2013-08-01 12:01:01 -07:00
check_bindir
check-builtins.sh
check-racy.c
color.c
color.h
column.c
column.h
combine-diff.c many small typofixes 2013-07-29 12:32:25 -07:00
command-list.txt builtin: add git-check-mailmap command 2013-07-13 10:19:37 -07:00
commit-slab.h commit-slab.h: Fix memory allocation and addressing 2013-07-29 08:44:29 -07:00
commit.c Merge branch 'bc/commit-invalid-utf8' 2013-08-05 10:11:04 -07:00
commit.h commit.h: drop redundant comment 2013-07-25 16:06:23 -07:00
config.c Merge branch 'hv/config-from-blob' 2013-07-22 11:24:09 -07:00
config.mak.in
config.mak.uname Merge branch 'rj/cygwin-clarify-use-of-cheating-lstat' 2013-08-02 11:01:01 -07:00
configure.ac configure: fix option help message for --disable-pthreads 2013-06-28 10:49:26 -07:00
connect.c
connected.c
connected.h
convert.c typofix: in-code comments 2013-07-22 16:06:49 -07:00
convert.h typofix: in-code comments 2013-07-22 16:06:49 -07:00
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 Merge branch 'sb/misc-fixes' 2013-07-24 19:20:59 -07:00
date.c
decorate.c
decorate.h
delta.h
diff-delta.c
diff-lib.c
diff-no-index.c
diff.c Merge branch 'ob/typofixes' 2013-07-24 19:23:01 -07:00
diff.h
diffcore-break.c
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c Merge branch 'rs/pickaxe-simplify' 2013-07-12 12:04:17 -07:00
diffcore-rename.c
diffcore.h
dir.c Merge branch 'nd/const-struct-cache-entry' 2013-07-22 11:24:01 -07:00
dir.h
editor.c
entry.c Merge branch 'nd/const-struct-cache-entry' 2013-07-22 11:24:01 -07:00
environment.c Merge branch 'jk/cat-file-batch-optim' 2013-07-24 19:21:21 -07:00
exec_cmd.c
exec_cmd.h Add the LAST_ARG_MUST_BE_NULL macro 2013-07-19 09:26:15 -07:00
fast-import.c
fetch-pack.c fetch-pack: avoid quadratic behavior in rev_list_push 2013-07-02 12:05:46 -07:00
fetch-pack.h
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: replace uses of --resolved with --continue 2013-06-27 09:37:12 -07:00
git-archimport.perl
git-bisect.sh
git-compat-util.h Merge branch 'rj/cygwin-clarify-use-of-cheating-lstat' 2013-08-02 11:01:01 -07:00
git-cvsexportcommit.perl
git-cvsimport.perl
git-cvsserver.perl
git-difftool--helper.sh
git-difftool.perl
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 many small typofixes 2013-07-29 12:32:25 -07:00
git-mergetool.sh
git-p4.py many small typofixes 2013-07-29 12:32:25 -07:00
git-parse-remote.sh
git-pull.sh Merge branch 'jk/pull-into-dirty-unborn' into maint 2013-07-15 10:35:43 -07:00
git-quiltimport.sh
git-rebase--am.sh
git-rebase--interactive.sh Merge branch 'rr/rebase-reflog-message-reword' 2013-07-18 12:48:20 -07:00
git-rebase--merge.sh
git-rebase.sh Merge branch 'rr/rebase-autostash' 2013-07-31 12:38:29 -07:00
git-relink.perl
git-remote-testgit.sh
git-remote-testpy.py
git-repack.sh
git-request-pull.sh request-pull: improve error message for invalid revision args 2013-07-17 12:30:58 -07:00
git-send-email.perl Merge branch 'rr/send-email-ssl-verify' 2013-07-22 11:24:17 -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 Revert "git stash: avoid data loss when "git stash save" kills a directory" 2013-08-14 09:53:43 -07:00
git-submodule.sh Merge branch 'fg/submodule-clone-depth' 2013-07-15 10:28:48 -07:00
git-svn.perl Merge branch 'vl/typofix' into maint 2013-07-19 10:42:57 -07:00
GIT-VERSION-GEN Git 1.8.4 2013-08-23 11:49:46 -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 'es/check-mailmap' 2013-07-22 11:24:14 -07:00
git.rc
git.spec.in
gpg-interface.c
gpg-interface.h
graph.c
graph.h
grep.c
grep.h
hash.c
hash.h
help.c cygwin: Remove the Win32 l/stat() implementation 2013-07-18 10:44:17 -07:00
help.h
hex.c
http-backend.c
http-fetch.c
http-push.c http-push.c::add_send_request(): do not initialize transfer_request 2013-07-19 11:15:17 -07:00
http-walker.c
http.c Merge branch 'bc/http-keep-memory-given-to-curl' into maint 2013-07-15 10:36:01 -07:00
http.h
ident.c
imap-send.c
INSTALL
kwset.c typofix: in-code comments 2013-07-22 16:06:49 -07:00
kwset.h
levenshtein.c
levenshtein.h
LGPL-2.1
line-log.c line-log: fix "log -LN" crash when N is last line of file 2013-07-23 12:09:48 -07:00
line-log.h
line-range.c line-range: fix "blame -L X,-N" regression 2013-07-17 18:02:12 -07:00
line-range.h
list-objects.c
list-objects.h
ll-merge.c
ll-merge.h
lockfile.c lockfile: fix buffer overflow in path handling 2013-07-07 10:29:28 -07:00
log-tree.c Merge branch 'jk/format-patch-from' 2013-07-15 10:28:40 -07:00
log-tree.h
mailmap.c mailmap: style fixes 2013-07-15 08:23:39 -07:00
mailmap.h
Makefile Merge branch 'rj/cygwin-clarify-use-of-cheating-lstat' 2013-08-02 11:01:01 -07:00
match-trees.c
merge-blobs.c
merge-blobs.h
merge-recursive.c Convert "struct cache_entry *" to "const ..." wherever possible 2013-07-09 09:12:48 -07:00
merge-recursive.h
merge.c
mergesort.c
mergesort.h
name-hash.c
notes-cache.c
notes-cache.h
notes-merge.c
notes-merge.h
notes-utils.c
notes-utils.h
notes.c
notes.h many small typofixes 2013-07-29 12:32:25 -07:00
object.c Merge branch 'sb/parse-object-buffer-eaten' 2013-07-22 11:23:33 -07:00
object.h
pack-check.c
pack-revindex.c pack-revindex: radix-sort the revindex 2013-07-12 09:20:54 -07:00
pack-revindex.h
pack-write.c
pack.h
pager.c
parse-options-cb.c
parse-options.c
parse-options.h Merge branch 'maint' 2013-08-09 15:49:55 -07:00
patch-delta.c
patch-ids.c
patch-ids.h
path.c Merge branch 'rj/cygwin-clarify-use-of-cheating-lstat' 2013-08-02 11:01:01 -07:00
pathspec.c Convert "struct cache_entry *" to "const ..." wherever possible 2013-07-09 09:12:48 -07:00
pathspec.h
pkt-line.c
pkt-line.h
preload-index.c
pretty.c teach format-patch to place other authors into in-body "From" 2013-07-03 12:11:04 -07:00
prio-queue.c
prio-queue.h
progress.c
progress.h
prompt.c
prompt.h
quote.c write_name{_quoted_relative,}(): remove redundant parameters 2013-06-26 11:22:06 -07:00
quote.h write_name{_quoted_relative,}(): remove redundant parameters 2013-06-26 11:22:06 -07:00
reachable.c
reachable.h
read-cache.c many small typofixes 2013-07-29 12:32:25 -07:00
README
reflog-walk.c
reflog-walk.h
refs.c Revert "Add new @ shortcut for HEAD" 2013-08-14 15:04:24 -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 1.8.3.4 2013-07-19 11:15:17 -07:00
remote-curl.c remote-http: use argv-array 2013-07-09 12:34:16 -07:00
remote-testsvn.c
remote.c Merge branch 'bc/push-match-many-refs' 2013-07-18 12:48:25 -07:00
remote.h
replace_object.c
rerere.c Convert "struct cache_entry *" to "const ..." wherever possible 2013-07-09 09:12:48 -07:00
rerere.h
resolve-undo.c Convert "struct cache_entry *" to "const ..." wherever possible 2013-07-09 09:12:48 -07:00
resolve-undo.h
revision.c Convert "struct cache_entry *" to "const ..." wherever possible 2013-07-09 09:12:48 -07:00
revision.h teach format-patch to place other authors into in-body "From" 2013-07-03 12:11:04 -07:00
run-command.c Merge branch 'tr/fd-gotcha-fixes' 2013-07-22 11:23:13 -07:00
run-command.h Add the LAST_ARG_MUST_BE_NULL macro 2013-07-19 09:26:15 -07:00
send-pack.c
send-pack.h
sequencer.c Convert "struct cache_entry *" to "const ..." wherever possible 2013-07-09 09:12:48 -07:00
sequencer.h
server-info.c
setup.c Merge branch 'jx/clean-interactive' 2013-07-22 11:24:11 -07:00
sh-i18n--envsubst.c
sha1_file.c Merge branch 'jk/cat-file-batch-optim' 2013-07-24 19:21:21 -07:00
sha1_name.c Revert "Add new @ shortcut for HEAD" 2013-08-14 15:04:24 -07:00
sha1-array.c
sha1-array.h
sha1-lookup.c
sha1-lookup.h
shallow.c Merge branch 'mk/upload-pack-off-by-one-dead-code-removal' 2013-07-22 11:24:05 -07:00
shell.c Merge branch 'tr/protect-low-3-fds' 2013-07-22 11:23:35 -07:00
shortlog.h
show-index.c
sideband.c
sideband.h
sigchain.c
sigchain.h
strbuf.c
strbuf.h
streaming.c Merge branch 'jk/cat-file-batch-optim' 2013-07-24 19:21:21 -07:00
streaming.h
string-list.c
string-list.h
submodule.c Merge branch 'nd/const-struct-cache-entry' 2013-07-22 11:24:01 -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 Convert "struct cache_entry *" to "const ..." wherever possible 2013-07-09 09:12:48 -07:00
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: run testcases with POSIX absolute paths on Windows 2013-06-26 11:25:12 -07:00
test-prio-queue.c
test-read-cache.c
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
thread-utils.h
trace.c add missing "format" function attributes 2013-07-09 22:23:04 -07:00
transport-helper.c many small typofixes 2013-07-29 12:32:25 -07:00
transport.c Merge branch 'ph/builtin-srcs-are-in-subdir-these-days' into maint 2013-07-21 22:51:29 -07:00
transport.h Merge branch 'ph/builtin-srcs-are-in-subdir-these-days' into maint 2013-07-21 22:51:29 -07:00
tree-diff.c
tree-walk.c traverse_trees(): clarify return value of the callback 2013-07-19 15:29:41 -07:00
tree-walk.h unpack-trees: don't shift conflicts left and right 2013-06-17 09:24:47 -07:00
tree.c Convert "struct cache_entry *" to "const ..." wherever possible 2013-07-09 09:12:48 -07:00
tree.h
unimplemented.sh
unix-socket.c
unix-socket.h
unpack-trees.c Convert "struct cache_entry *" to "const ..." wherever possible 2013-07-09 09:12:48 -07:00
unpack-trees.h
upload-pack.c
url.c
url.h
usage.c
userdiff.c
userdiff.h
utf8.c
utf8.h add missing "format" function attributes 2013-07-09 22:23:04 -07:00
varint.c
varint.h
version.c
version.h
walker.c
walker.h
wildmatch.c
wildmatch.h
wrap-for-bin.sh wrap-for-bin: make bin-wrappers chainable 2013-07-08 08:55:34 -07:00
wrapper.c Merge branch 'tr/fd-gotcha-fixes' 2013-07-22 11:23:13 -07:00
write_or_die.c
ws.c
wt-status.c Merge branch 'jx/clean-interactive' 2013-07-22 11:24:11 -07:00
wt-status.h wt-status: use "format" function attribute for status_printf 2013-07-09 22:23:11 -07:00
xdiff-interface.c
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
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