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authorJeff King <peff@peff.net>2016-02-11 17:28:36 -0500
committerJunio C Hamano <gitster@pobox.com>2016-02-12 12:51:17 -0800
commitde1e67d0703894cb6ea782e36abb63976ab07e60 (patch)
tree8229efe404fc34d5549d98e06998872919523e85 /pack-bitmap.c
parentbd64516aca4d4e22acb33c71429d293a14d355cf (diff)
downloadgit-de1e67d0703894cb6ea782e36abb63976ab07e60.tar.gz
git-de1e67d0703894cb6ea782e36abb63976ab07e60.tar.xz
list-objects: pass full pathname to callbacks
When we find a blob at "a/b/c", we currently pass this to our show_object_fn callbacks as two components: "a/b/" and "c". Callbacks which want the full value then call path_name(), which concatenates the two. But this is an inefficient interface; the path is a strbuf, and we could simply append "c" to it temporarily, then roll back the length, without creating a new copy. So we could improve this by teaching the callsites of path_name() this trick (and there are only 3). But we can also notice that no callback actually cares about the broken-down representation, and simply pass each callback the full path "a/b/c" as a string. The callback code becomes even simpler, then, as we do not have to worry about freeing an allocated buffer, nor rolling back our modification to the strbuf. This is theoretically less efficient, as some callbacks would not bother to format the final path component. But in practice this is not measurable. Since we use the same strbuf over and over, our work to grow it is amortized, and we really only pay to memcpy a few bytes. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'pack-bitmap.c')
-rw-r--r--pack-bitmap.c13
1 files changed, 4 insertions, 9 deletions
diff --git a/pack-bitmap.c b/pack-bitmap.c
index 51f790e7c..b949e5171 100644
--- a/pack-bitmap.c
+++ b/pack-bitmap.c
@@ -414,19 +414,15 @@ static int ext_index_add_object(struct object *object, const char *name)
return bitmap_pos + bitmap_git.pack->num_objects;
}
-static void show_object(struct object *object, struct strbuf *path,
- const char *last, void *data)
+static void show_object(struct object *object, const char *name, void *data)
{
struct bitmap *base = data;
int bitmap_pos;
bitmap_pos = bitmap_position(object->oid.hash);
- if (bitmap_pos < 0) {
- char *name = path_name(path, last);
+ if (bitmap_pos < 0)
bitmap_pos = ext_index_add_object(object, name);
- free(name);
- }
bitmap_set(base, bitmap_pos);
}
@@ -894,9 +890,8 @@ struct bitmap_test_data {
size_t seen;
};
-static void test_show_object(struct object *object,
- struct strbuf *path,
- const char *last, void *data)
+static void test_show_object(struct object *object, const char *name,
+ void *data)
{
struct bitmap_test_data *tdata = data;
int bitmap_pos;