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authorLibravatar Junio C Hamano <junkio@cox.net>2006-04-16 22:03:01 -0700
committerLibravatar Junio C Hamano <junkio@cox.net>2006-04-16 22:03:01 -0700
commitca9de6cadfa55c9b00476112e2bb52fe20ab95e0 (patch)
tree671b1df986324e9b44e0197b9e67dd463e70d591
parentGeert's similarity (diff)
downloadtgif-ca9de6cadfa55c9b00476112e2bb52fe20ab95e0.tar.xz
Try using Geert similarity code in pack-objects.
It appears the fingerprinting itself is too expensive to be worth doing for this purpose. A failed experiment. Signed-off-by: Junio C Hamano <junkio@cox.net>
-rw-r--r--Makefile2
-rw-r--r--pack-objects.c10
2 files changed, 11 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index 69ca05b2f9..aa499ed52f 100644
--- a/Makefile
+++ b/Makefile
@@ -204,7 +204,7 @@ DIFF_OBJS = \
diffcore-delta.o log-tree.o
LIB_OBJS = \
- blob.o commit.o connect.o csum-file.o \
+ blob.o commit.o connect.o csum-file.o gsimm.o rabinpoly.o \
date.o diff-delta.o entry.o exec_cmd.o ident.o index.o \
object.o pack-check.o patch-delta.o path.o pkt-line.o \
quote.o read-cache.o refs.o run-command.o \
diff --git a/pack-objects.c b/pack-objects.c
index 09f4f2c944..18f8f82571 100644
--- a/pack-objects.c
+++ b/pack-objects.c
@@ -8,6 +8,8 @@
#include "pack.h"
#include "csum-file.h"
#include "tree-walk.h"
+#include "rabinpoly.h"
+#include "gsimm.h"
#include <sys/time.h>
#include <signal.h>
@@ -993,6 +995,7 @@ static int type_size_sort(const struct object_entry *a, const struct object_entr
struct unpacked {
struct object_entry *entry;
+ unsigned char fingerprint[MD_LENGTH];
void *data;
};
@@ -1041,6 +1044,9 @@ static int try_delta(struct unpacked *cur, struct unpacked *old, unsigned max_de
if (old_entry->depth >= max_depth)
return 0;
+ if (gb_simm_score(cur->fingerprint, old->fingerprint) < 0.4)
+ return 0;
+
/*
* NOTE!
*
@@ -1077,6 +1083,7 @@ static void find_deltas(struct object_entry **list, int window, int depth)
unsigned processed = 0;
unsigned last_percent = 999;
+ rabin_reset ();
memset(array, 0, array_size);
i = nr_objects;
idx = 0;
@@ -1115,6 +1122,8 @@ static void find_deltas(struct object_entry **list, int window, int depth)
if (size != entry->size)
die("object %s inconsistent object length (%lu vs %lu)", sha1_to_hex(entry->sha1), size, entry->size);
+ gb_simm_process(n->data, size, n->fingerprint);
+
j = window;
while (--j > 0) {
unsigned int other_idx = idx + j;
@@ -1124,6 +1133,7 @@ static void find_deltas(struct object_entry **list, int window, int depth)
m = array + other_idx;
if (!m->entry)
break;
+
if (try_delta(n, m, depth) < 0)
break;
}