This reduces the size of 'struct object_entry' from 88 bytes
to 80 and therefore makes packing objects more efficient.
For example on a Linux repo with 12M objects,
`git pack-objects --all` needs extra 96MB memory even if the
layer feature is not used.
Helped-by: Jeff King <peff@xxxxxxxx>
Helped-by: Duy Nguyen <pclouds@xxxxxxxxx>
Signed-off-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
---
builtin/pack-objects.c | 4 ++--
delta-islands.c | 4 ++--
pack-objects.c | 6 ++++++
pack-objects.h | 20 ++++++++++++++++++--
4 files changed, 28 insertions(+), 6 deletions(-)
diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index fd3e514b31..d5d91eeed5 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -611,7 +611,7 @@ static inline void add_to_write_order(struct object_entry **wo,
unsigned int *endp,
struct object_entry *e)
{
- if (e->filled || e->layer != write_layer)
+ if (e->filled || oe_layer(&to_pack, e) != write_layer)
return;
wo[(*endp)++] = e;
e->filled = 1;
@@ -714,7 +714,7 @@ static void compute_layer_order(struct object_entry **wo, unsigned int *wo_end)
* Finally all the rest in really tight order
*/
for (i = last_untagged; i < to_pack.nr_objects; i++) {
- if (!objects[i].filled && objects[i].layer == write_layer)
+ if (!objects[i].filled && oe_layer(&to_pack, &objects[i]) == write_layer)
add_family_to_write_order(wo, wo_end, &objects[i]);
}
}
diff --git a/delta-islands.c b/delta-islands.c
index 3c8fe60801..92137f2eca 100644
--- a/delta-islands.c
+++ b/delta-islands.c
@@ -492,13 +492,13 @@ int compute_pack_layers(struct packing_data *to_pack)
struct object_entry *entry = &to_pack->objects[i];
khiter_t pos = kh_get_sha1(island_marks, entry->idx.oid.hash);
- entry->layer = 1;
+ oe_set_layer(to_pack, entry, 1);
if (pos < kh_end(island_marks)) {
struct island_bitmap *bitmap = kh_value(island_marks, pos);
if (island_bitmap_get(bitmap, island_counter_core))
- entry->layer = 0;
+ oe_set_layer(to_pack, entry, 0);
}
}
diff --git a/pack-objects.c b/pack-objects.c
index 30314572e6..98389460c2 100644
--- a/pack-objects.c
+++ b/pack-objects.c
@@ -163,6 +163,9 @@ struct object_entry *packlist_alloc(struct packing_data *pdata,
if (pdata->tree_depth)
REALLOC_ARRAY(pdata->tree_depth, pdata->nr_alloc);
+
+ if (pdata->layer)
+ REALLOC_ARRAY(pdata->layer, pdata->nr_alloc);
}
new_entry = pdata->objects + pdata->nr_objects++;
@@ -181,5 +184,8 @@ struct object_entry *packlist_alloc(struct packing_data *pdata,
if (pdata->tree_depth)
pdata->tree_depth[pdata->nr_objects - 1] = 0;
+ if (pdata->layer)
+ pdata->layer[pdata->nr_objects - 1] = 0;
+
return new_entry;
}
diff --git a/pack-objects.h b/pack-objects.h
index 3cb5527eeb..ad3c208764 100644
--- a/pack-objects.h
+++ b/pack-objects.h
@@ -101,8 +101,6 @@ struct object_entry {
unsigned no_try_delta:1;
unsigned in_pack_type:TYPE_BITS; /* could be delta */
- unsigned char layer;
-
unsigned preferred_base:1; /*
* we do not pack this, but is available
* to be used as the base object to delta
@@ -147,6 +145,7 @@ struct packing_data {
/* delta islands */
unsigned int *tree_depth;
+ unsigned char *layer;
};
void prepare_packing_data(struct packing_data *pdata);
@@ -369,4 +368,21 @@ static inline void oe_set_tree_depth(struct packing_data *pack,
pack->tree_depth[e - pack->objects] = tree_depth;
}
+static inline unsigned char oe_layer(struct packing_data *pack,
+ struct object_entry *e)
+{
+ if (!pack->layer)
+ return 0;
+ return pack->layer[e - pack->objects];
+}
+
+static inline void oe_set_layer(struct packing_data *pack,
+ struct object_entry *e,
+ unsigned char layer)
+{
+ if (!pack->layer)
+ ALLOC_ARRAY(pack->layer, pack->nr_objects);
+ pack->layer[e - pack->objects] = layer;
+}
+
#endif
--
2.18.0.555.g17f9c4abba
