diff options
| author |  Nguyễn Thái Ngọc Duy <pclouds@gmail.com> | 2018-04-14 17:35:07 +0200 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2018-04-16 12:38:58 +0900 |
| commit | 0cb3c1427a1e9cee638e0c1629933c907493d7e3 (patch) | |
| tree | bedda660265c0c090780a7c6ba008ad3816b55af /pack-objects.h | |
| parent | pack-objects: refer to delta objects by index instead of pointer (diff) | |
| download | tgif-0cb3c1427a1e9cee638e0c1629933c907493d7e3.tar.xz | |
pack-objects: shrink z_delta_size field in struct object_entry
We only cache deltas when it's smaller than a certain limit. This limit
defaults to 1000 but save its compressed length in a 64-bit field.
Shrink that field down to 20 bits, so you can only cache 1MB deltas.
Larger deltas must be recomputed at when the pack is written down.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'pack-objects.h')
| -rw-r--r-- | pack-objects.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/pack-objects.h b/pack-objects.h index e962dce3c0..9d0391c173 100644 --- a/pack-objects.h +++ b/pack-objects.h @@ -6,6 +6,7 @@ #define OE_DFS_STATE_BITS 2 #define OE_DEPTH_BITS 12 #define OE_IN_PACK_BITS 10 +#define OE_Z_DELTA_BITS 20 /* * State flags for depth-first search used for analyzing delta cycles. @@ -77,7 +78,7 @@ struct object_entry { */ void *delta_data; /* cached delta (uncompressed) */ unsigned long delta_size; /* delta data size (uncompressed) */ - unsigned long z_delta_size; /* delta data size (compressed) */ + unsigned z_delta_size:OE_Z_DELTA_BITS; unsigned type_:TYPE_BITS; unsigned in_pack_type:TYPE_BITS; /* could be delta */ unsigned type_valid:1; |