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cache-tree: trace regions for I/O 

As we write or read the cache tree index extension, it can be good to
isolate how much of the file I/O time is spent constructing this
in-memory tree from the existing index or writing it out again to the
new index file. Use trace2 regions to indicate that we are spending time
on this operation.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee 2021-01-04 03:09:13 +00:00 committed by Junio C Hamano
parent fa7ca5d4fe
commit 4c3e18723c
1 changed files with 10 additions and 1 deletions
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11
cache-tree.c
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@ -494,7 +494,9 @@ static void write_one(struct strbuf *buffer, struct cache_tree *it,
void cache_tree_write(struct strbuf *sb, struct cache_tree *root)
{
trace2_region_enter("cache_tree", "write", the_repository);
write_one(sb, root, "", 0);
trace2_region_leave("cache_tree", "write", the_repository);
}
static struct cache_tree *read_one(const char **buffer, unsigned long *size_p)
@ -583,9 +585,16 @@ static struct cache_tree *read_one(const char **buffer, unsigned long *size_p)
struct cache_tree *cache_tree_read(const char *buffer, unsigned long size)
{
struct cache_tree *result;
if (buffer[0])
return NULL; /* not the whole tree */
return read_one(&buffer, &size);
trace2_region_enter("cache_tree", "read", the_repository);
result = read_one(&buffer, &size);
trace2_region_leave("cache_tree", "read", the_repository);
return result;
}
static struct cache_tree *cache_tree_find(struct cache_tree *it, const char *path)