1 files changed, 127 insertions, 0 deletions
diff --git a/t/perf/p2000-sparse-operations.sh b/t/perf/p2000-sparse-operations.sh
new file mode 100755
index 0000000..c181110
--- /dev/null
+++ b/t/perf/p2000-sparse-operations.sh
@@ -0,0 +1,127 @@
+#!/bin/sh
+
+test_description="test performance of Git operations using the index"
+
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+SPARSE_CONE=f2/f4
+
+test_expect_success 'setup repo and indexes' '
+	git reset --hard HEAD &&
+
+	# Remove submodules from the example repo, because our
+	# duplication of the entire repo creates an unlikely data shape.
+	if git config --file .gitmodules --get-regexp "submodule.*.path" >modules
+	then
+		git rm $(awk "{print \$2}" modules) &&
+		git commit -m "remove submodules" || return 1
+	fi &&
+
+	echo bogus >a &&
+	cp a b &&
+	git add a b &&
+	git commit -m "level 0" &&
+	BLOB=$(git rev-parse HEAD:a) &&
+	OLD_COMMIT=$(git rev-parse HEAD) &&
+	OLD_TREE=$(git rev-parse HEAD^{tree}) &&
+
+	for i in $(test_seq 1 3)
+	do
+		cat >in <<-EOF &&
+			100755 blob $BLOB	a
+			040000 tree $OLD_TREE	f1
+			040000 tree $OLD_TREE	f2
+			040000 tree $OLD_TREE	f3
+			040000 tree $OLD_TREE	f4
+		EOF
+		NEW_TREE=$(git mktree <in) &&
+		NEW_COMMIT=$(git commit-tree $NEW_TREE -p $OLD_COMMIT -m "level $i") &&
+		OLD_TREE=$NEW_TREE &&
+		OLD_COMMIT=$NEW_COMMIT || return 1
+	done &&
+
+	git sparse-checkout init --cone &&
+	git sparse-checkout set $SPARSE_CONE &&
+	git checkout -b wide $OLD_COMMIT &&
+
+	for l2 in f1 f2 f3 f4
+	do
+		echo more bogus >>$SPARSE_CONE/$l2/a &&
+		git commit -a -m "edit $SPARSE_CONE/$l2/a" || return 1
+	done &&
+
+	git -c core.sparseCheckoutCone=true clone --branch=wide --sparse . full-v3 &&
+	(
+		cd full-v3 &&
+		git sparse-checkout init --cone &&
+		git sparse-checkout set $SPARSE_CONE &&
+		git config index.version 3 &&
+		git update-index --index-version=3 &&
+		git checkout HEAD~4
+	) &&
+	git -c core.sparseCheckoutCone=true clone --branch=wide --sparse . full-v4 &&
+	(
+		cd full-v4 &&
+		git sparse-checkout init --cone &&
+		git sparse-checkout set $SPARSE_CONE &&
+		git config index.version 4 &&
+		git update-index --index-version=4 &&
+		git checkout HEAD~4
+	) &&
+	git -c core.sparseCheckoutCone=true clone --branch=wide --sparse . sparse-v3 &&
+	(
+		cd sparse-v3 &&
+		git sparse-checkout init --cone --sparse-index &&
+		git sparse-checkout set $SPARSE_CONE &&
+		git config index.version 3 &&
+		git update-index --index-version=3 &&
+		git checkout HEAD~4
+	) &&
+	git -c core.sparseCheckoutCone=true clone --branch=wide --sparse . sparse-v4 &&
+	(
+		cd sparse-v4 &&
+		git sparse-checkout init --cone --sparse-index &&
+		git sparse-checkout set $SPARSE_CONE &&
+		git config index.version 4 &&
+		git update-index --index-version=4 &&
+		git checkout HEAD~4
+	)
+'
+
+test_perf_on_all () {
+	command="$@"
+	for repo in full-v3 full-v4 \
+		    sparse-v3 sparse-v4
+	do
+		test_perf "$command ($repo)" "
+			(
+				cd $repo &&
+				echo >>$SPARSE_CONE/a &&
+				$command
+			)
+		"
+	done
+}
+
+test_perf_on_all git status
+test_perf_on_all 'git stash && git stash pop'
+test_perf_on_all 'echo >>new && git stash -u && git stash pop'
+test_perf_on_all git add -A
+test_perf_on_all git add .
+test_perf_on_all git commit -a -m A
+test_perf_on_all git checkout -f -
+test_perf_on_all "git sparse-checkout add f2/f3/f1 && git sparse-checkout set $SPARSE_CONE"
+test_perf_on_all git reset
+test_perf_on_all git reset --hard
+test_perf_on_all git reset -- does-not-exist
+test_perf_on_all git diff
+test_perf_on_all git diff --cached
+test_perf_on_all git blame $SPARSE_CONE/a
+test_perf_on_all git blame $SPARSE_CONE/f3/a
+test_perf_on_all git read-tree -mu HEAD
+test_perf_on_all git checkout-index -f --all
+test_perf_on_all git update-index --add --remove $SPARSE_CONE/a
+
+test_done