Update 'git write-tree' to allow using the sparse-index in memory without expanding to a full one. The recursive algorithm for update_one() was already updated in 2de37c5 (cache-tree: integrate with sparse directory entries, 2021-03-03) to handle sparse directory entries in the index. Hence we can just set the requires-full-index to false for "write-tree". The `p2000` tests demonstrate a ~96% execution time reduction for 'git write-tree' using a sparse index: Test before after ----------------------------------------------------------------- 2000.78: git write-tree (full-v3) 0.34 0.33 -2.9% 2000.79: git write-tree (full-v4) 0.32 0.30 -6.3% 2000.80: git write-tree (sparse-v3) 0.47 0.02 -95.8% 2000.81: git write-tree (sparse-v4) 0.45 0.02 -95.6% Signed-off-by: Shuqi Liang <cheskaqiqi@xxxxxxxxx> --- builtin/write-tree.c | 4 ++++ t/perf/p2000-sparse-operations.sh | 1 + t/t1092-sparse-checkout-compatibility.sh | 28 ++++++++++++++++++++++++ 3 files changed, 33 insertions(+) diff --git a/builtin/write-tree.c b/builtin/write-tree.c index 45d61707e7..28c45b4301 100644 --- a/builtin/write-tree.c +++ b/builtin/write-tree.c @@ -35,6 +35,10 @@ int cmd_write_tree(int argc, const char **argv, const char *cmd_prefix) }; git_config(git_default_config, NULL); + + prepare_repo_settings(the_repository); + the_repository->settings.command_requires_full_index = 0; + argc = parse_options(argc, argv, cmd_prefix, write_tree_options, write_tree_usage, 0); diff --git a/t/perf/p2000-sparse-operations.sh b/t/perf/p2000-sparse-operations.sh index 3242cfe91a..9924adfc26 100755 --- a/t/perf/p2000-sparse-operations.sh +++ b/t/perf/p2000-sparse-operations.sh @@ -125,5 +125,6 @@ test_perf_on_all git checkout-index -f --all test_perf_on_all git update-index --add --remove $SPARSE_CONE/a test_perf_on_all "git rm -f $SPARSE_CONE/a && git checkout HEAD -- $SPARSE_CONE/a" test_perf_on_all git grep --cached --sparse bogus -- "f2/f1/f1/*" +test_perf_on_all git write-tree test_done diff --git a/t/t1092-sparse-checkout-compatibility.sh b/t/t1092-sparse-checkout-compatibility.sh index 801919009e..3b8191b390 100755 --- a/t/t1092-sparse-checkout-compatibility.sh +++ b/t/t1092-sparse-checkout-compatibility.sh @@ -2055,4 +2055,32 @@ test_expect_success 'grep sparse directory within submodules' ' test_cmp actual expect ' +test_expect_success 'write-tree on all' ' + init_repos && + + write_script edit-contents <<-\EOF && + echo text >>"$1" + EOF + + run_on_all ../edit-contents deep/a && + run_on_all git update-index deep/a && + test_all_match git write-tree && + + run_on_all mkdir -p folder1 && + run_on_all cp a folder1/a && + run_on_all ../edit-contents folder1/a && + run_on_all git update-index folder1/a && + test_all_match git write-tree +' + +test_expect_success 'sparse-index is not expanded: write-tree' ' + init_repos && + + ensure_not_expanded write-tree && + + echo "test1" >>sparse-index/a && + git -C sparse-index update-index a && + ensure_not_expanded write-tree +' + test_done -- 2.39.0
