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index: fill the tree cache on write-tree

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An obvious place to fill the tree cache is on write-tree, as we're
guaranteed to be able to fill in the whole tree cache.

The way this commit does this is not the most efficient, as we read the
root tree from the odb instead of filling in the cache as we go along,
but it fills the cache such that successive operations (and persisting
the index to disk) will be able to take advantage of the cache, and it
reuses the code we already have for filling the cache.

Filling in the cache as we create the trees would require some
reallocation of the children vector, which is currently not possible
with out pool implementation. A different data structure would likely
allow us to perform this operation at a later date.
This commit is contained in:
Carlos Martín Nieto 2014-09-29 09:07:41 +02:00
parent 795d8e9328
commit 7465e87399
1 changed files with 16 additions and 1 deletions
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17
src/tree.c
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@ -579,6 +579,7 @@ int git_tree__write_index(
git_oid *oid, git_index *index, git_repository *repo)
{
int ret;
git_tree *tree;
bool old_ignore_case = false;
assert(oid && index && repo);
@ -609,7 +610,21 @@ int git_tree__write_index(
if (old_ignore_case)
git_index__set_ignore_case(index, true);
return ret < 0 ? ret : 0;
index->tree = NULL;
if (ret < 0)
return ret;
git_pool_clear(&index->tree_pool);
if ((ret = git_tree_lookup(&tree, repo, oid)) < 0)
return ret;
/* Read the tree cache into the index */
ret = git_tree_cache_read_tree(&index->tree, tree, &index->tree_pool);
git_tree_free(tree);
return ret;
}
int git_treebuilder_create(git_treebuilder **builder_p, const git_tree *source)