Add an expensive test for git-notes
git-notes have the potential of being pretty expensive, so test with
a lot of commits. A lot. So to make things cheaper, you have to
opt-in explicitely, by setting the environment variable
GIT_NOTES_TIMING_TESTS.
This patch has been improved by the following contributions:
- Junio C Hamano: tests: fix "export var=val"
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Johan Herland <johan@herland.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/t3302-notes-index-expensive.sh b/t/t3302-notes-index-expensive.sh
new file mode 100755
index 0000000..0ef3e95
--- /dev/null
+++ b/t/t3302-notes-index-expensive.sh
@@ -0,0 +1,98 @@
+#!/bin/sh
+#
+# Copyright (c) 2007 Johannes E. Schindelin
+#
+
+test_description='Test commit notes index (expensive!)'
+
+. ./test-lib.sh
+
+test -z "$GIT_NOTES_TIMING_TESTS" && {
+ say Skipping timing tests
+ test_done
+ exit
+}
+
+create_repo () {
+ number_of_commits=$1
+ nr=0
+ parent=
+ test -d .git || {
+ git init &&
+ tree=$(git write-tree) &&
+ while [ $nr -lt $number_of_commits ]; do
+ test_tick &&
+ commit=$(echo $nr | git commit-tree $tree $parent) ||
+ return
+ parent="-p $commit"
+ nr=$(($nr+1))
+ done &&
+ git update-ref refs/heads/master $commit &&
+ {
+ GIT_INDEX_FILE=.git/temp; export GIT_INDEX_FILE;
+ git rev-list HEAD | cat -n | sed "s/^[ ][ ]*/ /g" |
+ while read nr sha1; do
+ blob=$(echo note $nr | git hash-object -w --stdin) &&
+ echo $sha1 | sed "s/^/0644 $blob 0 /"
+ done | git update-index --index-info &&
+ tree=$(git write-tree) &&
+ test_tick &&
+ commit=$(echo notes | git commit-tree $tree) &&
+ git update-ref refs/notes/commits $commit
+ } &&
+ git config core.notesRef refs/notes/commits
+ }
+}
+
+test_notes () {
+ count=$1 &&
+ git config core.notesRef refs/notes/commits &&
+ git log | grep "^ " > output &&
+ i=1 &&
+ while [ $i -le $count ]; do
+ echo " $(($count-$i))" &&
+ echo " note $i" &&
+ i=$(($i+1));
+ done > expect &&
+ git diff expect output
+}
+
+cat > time_notes << \EOF
+ mode=$1
+ i=1
+ while [ $i -lt $2 ]; do
+ case $1 in
+ no-notes)
+ GIT_NOTES_REF=non-existing; export GIT_NOTES_REF
+ ;;
+ notes)
+ unset GIT_NOTES_REF
+ ;;
+ esac
+ git log >/dev/null
+ i=$(($i+1))
+ done
+EOF
+
+time_notes () {
+ for mode in no-notes notes
+ do
+ echo $mode
+ /usr/bin/time sh ../time_notes $mode $1
+ done
+}
+
+for count in 10 100 1000 10000; do
+
+ mkdir $count
+ (cd $count;
+
+ test_expect_success "setup $count" "create_repo $count"
+
+ test_expect_success 'notes work' "test_notes $count"
+
+ test_expect_success 'notes timing' "time_notes 100"
+ )
+done
+
+test_done
