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