merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 56 insertions, 0 deletions

diff --git a/third_party/git/t/perf/p3400-rebase.sh b/third_party/git/t/perf/p3400-rebase.sh
new file mode 100755
index 000000000000..d202aaed06fc
--- /dev/null
+++ b/third_party/git/t/perf/p3400-rebase.sh
@@ -0,0 +1,56 @@
+#!/bin/sh
+
+test_description='Tests rebase performance'
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+test_expect_success 'setup rebasing on top of a lot of changes' '
+	git checkout -f -B base &&
+	git checkout -B to-rebase &&
+	git checkout -B upstream &&
+	for i in $(seq 100)
+	do
+		# simulate huge diffs
+		echo change$i >unrelated-file$i &&
+		seq 1000 >>unrelated-file$i &&
+		git add unrelated-file$i &&
+		test_tick &&
+		git commit -m commit$i unrelated-file$i &&
+		echo change$i >unrelated-file$i &&
+		seq 1000 | tac >>unrelated-file$i &&
+		git add unrelated-file$i &&
+		test_tick &&
+		git commit -m commit$i-reverse unrelated-file$i ||
+		break
+	done &&
+	git checkout to-rebase &&
+	test_commit our-patch interesting-file
+'
+
+test_perf 'rebase on top of a lot of unrelated changes' '
+	git rebase --onto upstream HEAD^ &&
+	git rebase --onto base HEAD^
+'
+
+test_expect_success 'setup rebasing many changes without split-index' '
+	git config core.splitIndex false &&
+	git checkout -B upstream2 to-rebase &&
+	git checkout -B to-rebase2 upstream
+'
+
+test_perf 'rebase a lot of unrelated changes without split-index' '
+	git rebase --onto upstream2 base &&
+	git rebase --onto base upstream2
+'
+
+test_expect_success 'setup rebasing many changes with split-index' '
+	git config core.splitIndex true
+'
+
+test_perf 'rebase a lot of unrelated changes with split-index' '
+	git rebase --onto upstream2 base &&
+	git rebase --onto base upstream2
+'
+
+test_done