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Karsten Blees 6aa3085702 trace: improve trace performance 
The trace API currently rechecks the environment variable and reopens the
trace file on every API call. This has the ugly side effect that errors
(e.g. file cannot be opened, or the user specified a relative path) are
also reported on every call. Performance can be improved by about factor
three by remembering the environment state and keeping the file open.

Replace the 'const char *key' parameter in the API with a pointer to a
'struct trace_key' that bundles the environment variable name with
additional, trace-internal state. Change the call sites of these APIs to
use a static 'struct trace_key' instead of a string constant.

In trace.c::get_trace_fd(), save and reuse the file descriptor in 'struct
trace_key'.

Add a 'trace_disable()' API, so that packet_trace() can cleanly disable
tracing when it encounters packed data (instead of using unsetenv()).

Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-07-13 21:24:23 -07:00
..
add.c Merge branch 'fr/add-interactive-argv-array' 2014-03-28 13:51:05 -07:00
annotate.c
apply.c Merge branch 'jc/apply-ignore-whitespace' 2014-06-03 12:06:40 -07:00
archive.c replace {pre,suf}fixcmp() with {starts,ends}_with() 2013-12-05 14:13:21 -08:00
bisect--helper.c
blame.c Merge branch 'bc/blame-crlf-test' 2014-06-06 11:26:50 -07:00
branch.c use wildmatch() directly without fnmatch() wrapper 2014-02-20 14:15:46 -08:00
bundle.c
cat-file.c Merge branch 'jk/warn-on-object-refname-ambiguity' 2014-03-25 11:07:36 -07:00
check-attr.c Merge branch 'jc/check-attr-honor-working-tree' into maint 2014-03-18 14:03:03 -07:00
check-ignore.c
check-mailmap.c
check-ref-format.c
checkout-index.c Merge branch 'nd/lift-path-max' 2013-10-30 12:10:56 -07:00
checkout.c Merge branch 'rs/reflog-exists' 2014-06-06 11:23:04 -07:00
clean.c Merge branch 'jl/nor-or-nand-and' 2014-04-08 12:00:28 -07:00
clone.c refs.h: rename the action_on_err constants 2014-04-07 12:09:11 -07:00
column.c replace {pre,suf}fixcmp() with {starts,ends}_with() 2013-12-05 14:13:21 -08:00
commit-tree.c commit-tree: add and document --no-gpg-sign 2014-02-24 14:51:35 -08:00
commit.c Merge branch 'jl/status-added-submodule-is-never-ignored' 2014-06-16 10:07:19 -07:00
config.c Merge branch 'jk/daemon-tolower' 2014-06-16 10:07:15 -07:00
count-objects.c
credential.c
describe.c Merge branch 'nd/no-more-fnmatch' 2014-03-14 14:25:31 -07:00
diff-files.c
diff-index.c
diff-tree.c
diff.c Merge branch 'tg/diff-no-index-refactor' 2013-12-27 14:58:17 -08:00
fast-export.c fast-export: add support to delete refs 2014-04-21 11:47:34 -07:00
fetch-pack.c Merge branch 'nd/shallow-clone' 2014-01-17 12:21:20 -08:00
fetch.c Merge branch 'ep/varscope' 2014-02-27 14:01:30 -08:00
fmt-merge-msg.c replace {pre,suf}fixcmp() with {starts,ends}_with() 2013-12-05 14:13:21 -08:00
for-each-ref.c use wildmatch() directly without fnmatch() wrapper 2014-02-20 14:15:46 -08:00
fsck.c Merge branch 'mh/replace-refs-variable-rename' 2014-03-14 14:27:06 -07:00
gc.c Merge branch 'nd/daemonize-gc' 2014-06-16 12:18:12 -07:00
get-tar-commit-id.c stop installing git-tar-tree link 2013-12-03 12:35:22 -08:00
grep.c Merge branch 'sk/spawn-less-case-insensitively-from-grep-O-i' 2014-06-06 11:32:49 -07:00
hash-object.c
help.c builtin/help.c: speed up is_git_command() by checking for builtin commands first 2014-01-06 11:26:31 -08:00
index-pack.c Merge branch 'jk/index-pack-report-missing' 2014-06-06 11:28:13 -07:00
init-db.c i18n: only extract comments marked with "TRANSLATORS:" 2014-04-17 11:09:56 -07:00
log.c Merge branch 'lt/log-auto-decorate' 2014-06-16 12:18:41 -07:00
ls-files.c pathspec: pass directory indicator to match_pathspec_item() 2014-02-24 14:37:19 -08:00
ls-remote.c builtin/ls-remote.c: rearrange xcalloc arguments 2014-05-27 14:00:43 -07:00
ls-tree.c pathspec: rename match_pathspec_depth() to match_pathspec() 2014-02-24 14:37:14 -08:00
mailinfo.c Merge branch 'rs/mailinfo-header-cmp' 2014-06-09 11:27:53 -07:00
mailsplit.c
merge-base.c Merge branch 'bm/merge-base-octopus-dedup' into maint 2014-02-13 13:38:59 -08:00
merge-file.c
merge-index.c
merge-ours.c
merge-recursive.c replace {pre,suf}fixcmp() with {starts,ends}_with() 2013-12-05 14:13:21 -08:00
merge-tree.c
merge.c Merge branch 'fc/merge-default-to-upstream' 2014-06-03 12:06:43 -07:00
mktag.c
mktree.c builtin/mktree.c: use ALLOC_GROW() in append_to_tree() 2014-03-03 14:54:45 -08:00
mv.c Merge branch 'dt/merge-recursive-case-insensitive' 2014-06-06 11:23:13 -07:00
name-rev.c use wildmatch() directly without fnmatch() wrapper 2014-02-20 14:15:46 -08:00
notes.c Merge branch 'mh/ref-transaction' 2014-06-03 12:06:41 -07:00
pack-objects.c Merge branch 'jk/pack-bitmap' 2014-04-08 12:00:33 -07:00
pack-redundant.c
pack-refs.c
patch-id.c patch-id: make it stable against hunk reordering 2014-06-10 13:09:24 -07:00
prune-packed.c i18n: mark all progress lines for translation 2014-02-24 09:08:37 -08:00
prune.c Merge branch 'mh/replace-refs-variable-rename' 2014-03-14 14:27:06 -07:00
push.c Merge branch 'cc/starts-n-ends-with-endgame' 2014-03-07 15:18:28 -08:00
read-tree.c C: have space around && and || operators 2013-10-16 10:26:39 -07:00
receive-pack.c trace: improve trace performance 2014-07-13 21:24:23 -07:00
reflog.c refs.c: add new functions reflog_exists and delete_reflog 2014-05-08 14:31:43 -07:00
remote-ext.c
remote-fd.c
remote.c Merge branch 'jl/remote-rm-prune' 2014-06-16 12:17:58 -07:00
repack.c Merge branch 'jk/repack-pack-keep-objects' 2014-03-18 13:50:29 -07:00
replace.c replace: add --edit to usage string 2014-05-19 13:39:54 -07:00
rerere.c rerere: fix for merge.conflictstyle 2014-04-30 10:30:02 -07:00
reset.c refs.h: rename the action_on_err constants 2014-04-07 12:09:11 -07:00
rev-list.c Merge branch 'jk/pack-bitmap' 2014-02-27 14:01:48 -08:00
rev-parse.c rev-parse --parseopt: option argument name hints 2014-03-23 17:28:03 -07:00
revert.c parse-options: multi-word argh should use dash to separate words 2014-03-24 10:43:34 -07:00
rm.c Merge branch 'nd/submodule-pathspec-ending-with-slash' 2014-02-27 14:01:15 -08:00
send-pack.c Merge branch 'nd/shallow-clone' 2014-01-17 12:21:20 -08:00
shortlog.c replace {pre,suf}fixcmp() with {starts,ends}_with() 2013-12-05 14:13:21 -08:00
show-branch.c use wildmatch() directly without fnmatch() wrapper 2014-02-20 14:15:46 -08:00
show-ref.c replace {pre,suf}fixcmp() with {starts,ends}_with() 2013-12-05 14:13:21 -08:00
stripspace.c
symbolic-ref.c replace {pre,suf}fixcmp() with {starts,ends}_with() 2013-12-05 14:13:21 -08:00
tag.c Merge branch 'tg/tag-state-tag-name-in-editor-hints' 2014-06-06 11:22:25 -07:00
unpack-file.c
unpack-objects.c Merge branch 'mh/replace-refs-variable-rename' 2014-03-14 14:27:06 -07:00
update-index.c update-index: fix segfault with missing --cacheinfo argument 2014-06-04 11:02:55 -07:00
update-ref.c update-ref --stdin: reimplement using reference transactions 2014-04-07 12:09:14 -07:00
update-server-info.c
upload-archive.c replace {pre,suf}fixcmp() with {starts,ends}_with() 2013-12-05 14:13:21 -08:00
var.c
verify-pack.c
verify-tag.c
write-tree.c