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pack-redundant: delay creation of unique_objects 

Instead of initializing unique_objects in `add_pack()`, copy from
all_objects in `cmp_two_packs()`, when unwanted objects are removed from
all_objects.

This will save memory (no allocate memory for alt-odb packs), and run
`llist_sorted_difference_inplace()` only once when removing ignored
objects and removing objects in alt-odb in `scan_alt_odb_packs()`.

Signed-off-by: Jiang Xin <zhiyou.jx@alibaba-inc.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jiang Xin 2019-02-02 21:30:13 +08:00 committed by Junio C Hamano
parent 3173a94d57
commit 3011177640
1 changed files with 10 additions and 5 deletions
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15
builtin/pack-redundant.c
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@ -254,6 +254,11 @@ static void cmp_two_packs(struct pack_list *p1, struct pack_list *p2)
struct llist_item *p1_hint = NULL, *p2_hint = NULL;
const unsigned int hashsz = the_hash_algo->rawsz;
if (!p1->unique_objects)
p1->unique_objects = llist_copy(p1->all_objects);
if (!p2->unique_objects)
p2->unique_objects = llist_copy(p2->all_objects);
p1_base = p1->pack->index_data;
p2_base = p2->pack->index_data;
p1_base += 256 * 4 + ((p1->pack->index_version < 2) ? 4 : 8);
@ -536,7 +541,7 @@ static void scan_alt_odb_packs(void)
while (alt) {
local = local_packs;
while (local) {
llist_sorted_difference_inplace(local->unique_objects,
llist_sorted_difference_inplace(local->all_objects,
alt->all_objects);
local = local->next;
}
@ -567,8 +572,7 @@ static struct pack_list * add_pack(struct packed_git *p)
llist_insert_back(l.all_objects, (const struct object_id *)(base + off));
off += step;
}
/* this list will be pruned in cmp_two_packs later */
l.unique_objects = llist_copy(l.all_objects);
l.unique_objects = NULL;
if (p->pack_local)
return pack_list_insert(&local_packs, &l);
else
@ -646,7 +650,6 @@ int cmd_pack_redundant(int argc, const char **argv, const char *prefix)
load_all_objects();
cmp_local_packs();
if (alt_odb)
scan_alt_odb_packs();
@ -663,10 +666,12 @@ int cmd_pack_redundant(int argc, const char **argv, const char *prefix)
llist_sorted_difference_inplace(all_objects, ignore);
pl = local_packs;
while (pl) {
llist_sorted_difference_inplace(pl->unique_objects, ignore);
llist_sorted_difference_inplace(pl->all_objects, ignore);
pl = pl->next;
}
cmp_local_packs();
minimize(&min);
if (verbose) {