t3427: accelerate this test by using fast-export and fast-import

fast-export and fast-import can easily handle the simple rewrite that
was being done by filter-branch, and should be faster on systems with a
slow fork.  Measuring the overall time taken for all of t3427 (not just
the difference between filter-branch and fast-export/fast-import) shows
a speedup of about 5% on Linux and 11% on Mac.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Elijah Newren 2019-09-04 14:40:48 -07:00 коммит произвёл Junio C Hamano
Родитель e1fac531ea
Коммит 476998d05b
1 изменённых файлов: 4 добавлений и 1 удалений

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@ -59,7 +59,10 @@ test_expect_success 'setup' '
test_commit files_subtree/master5 &&
git checkout -b to-rebase &&
git filter-branch --prune-empty -f --subdirectory-filter files_subtree &&
git fast-export --no-data HEAD -- files_subtree/ |
sed -e "s%\([0-9a-f]\{40\} \)files_subtree/%\1%" |
git fast-import --force --quiet &&
git reset --hard &&
git commit -m "Empty commit" --allow-empty
'