threaded delta search: better chunck split point

Try to keep object with the same name hash together.

Suggested by Martin Koegler.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index 60141196df4f7adad565ce9b839d58e984f102e1..b13558ee7ea2623d426bc4af7787e3e488990dda 100644 (file)
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -1635,6 +1635,11 @@ static void ll_find_deltas(struct object_entry **list, unsigned list_size,
                if (sublist_size > list_size)
                        sublist_size = list_size;
 
+               /* try to split chunks on "path" boundaries */
+               while (sublist_size < list_size && list[sublist_size]->hash &&
+                      list[sublist_size]->hash == list[sublist_size-1]->hash)
+                       sublist_size++;
+
                pthread_mutex_lock(&data_provider);
                data_requester->list = list;
                data_requester->list_size = sublist_size;