diff --git a/fsck-objects.c b/fsck-objects.c
index 9950be2645..6439d55126 100644
--- a/fsck-objects.c
+++ b/fsck-objects.c
@@ -61,9 +61,12 @@ static void check_connectivity(void)
 	int i;
 
 	/* Look up all the requirements, warn about missing objects.. */
-	for (i = 0; i < nr_objs; i++) {
+	for (i = 0; i < obj_allocs; i++) {
 		struct object *obj = objs[i];
 
+		if (!obj)
+			continue;
+
 		if (!obj->parsed) {
 			if (!standalone && has_sha1_file(obj->sha1))
 				; /* it is in pack */
diff --git a/git-tag.sh b/git-tag.sh
index 6d0c973239..c74e1b4151 100755
--- a/git-tag.sh
+++ b/git-tag.sh
@@ -85,7 +85,8 @@ if [ "$annotate" ]; then
 	exit 1
     }
 
-    ( echo -e "object $object\ntype $type\ntag $name\ntagger $tagger\n";
+    ( printf 'object %s\ntype %s\ntag %s\ntagger %s\n\n' \
+	"$object" "$type" "$name" "$tagger";
       cat "$GIT_DIR"/TAG_FINALMSG ) >"$GIT_DIR"/TAG_TMP
     rm -f "$GIT_DIR"/TAG_TMP.asc "$GIT_DIR"/TAG_FINALMSG
     if [ "$signed" ]; then
diff --git a/name-rev.c b/name-rev.c
index bbadb91aa0..0c3f547622 100644
--- a/name-rev.c
+++ b/name-rev.c
@@ -232,9 +232,10 @@ int main(int argc, char **argv)
 	} else if (all) {
 		int i;
 
-		for (i = 0; i < nr_objs; i++)
-			printf("%s %s\n", sha1_to_hex(objs[i]->sha1),
-					get_rev_name(objs[i]));
+		for (i = 0; i < obj_allocs; i++)
+			if (objs[i])
+				printf("%s %s\n", sha1_to_hex(objs[i]->sha1),
+						get_rev_name(objs[i]));
 	} else
 		for ( ; revs; revs = revs->next)
 			printf("%s %s\n", revs->name, get_rev_name(revs->item));
diff --git a/object.c b/object.c
index 1577f74281..c9ca481498 100644
--- a/object.c
+++ b/object.c
@@ -6,30 +6,34 @@
 #include "tag.h"
 
 struct object **objs;
-int nr_objs;
-static int obj_allocs;
+static int nr_objs;
+int obj_allocs;
 
 int track_object_refs = 1;
 
+static int hashtable_index(const unsigned char *sha1)
+{
+	unsigned int i;
+	memcpy(&i, sha1, sizeof(unsigned int));
+	return (int)(i % obj_allocs);
+}
+
 static int find_object(const unsigned char *sha1)
 {
-	int first = 0, last = nr_objs;
+	int i;
 
-        while (first < last) {
-                int next = (first + last) / 2;
-                struct object *obj = objs[next];
-                int cmp;
+	if (!objs)
+		return -1;
 
-                cmp = memcmp(sha1, obj->sha1, 20);
-                if (!cmp)
-                        return next;
-                if (cmp < 0) {
-                        last = next;
-                        continue;
-                }
-                first = next+1;
-        }
-        return -first-1;
+	i = hashtable_index(sha1);
+	while (objs[i]) {
+		if (memcmp(sha1, objs[i]->sha1, 20) == 0)
+			return i;
+		i++;
+		if (i == obj_allocs)
+			i = 0;
+	}
+	return -1 - i;
 }
 
 struct object *lookup_object(const unsigned char *sha1)
@@ -42,7 +46,7 @@ struct object *lookup_object(const unsigned char *sha1)
 
 void created_object(const unsigned char *sha1, struct object *obj)
 {
-	int pos = find_object(sha1);
+	int pos;
 
 	obj->parsed = 0;
 	memcpy(obj->sha1, sha1, 20);
@@ -50,19 +54,28 @@ void created_object(const unsigned char *sha1, struct object *obj)
 	obj->refs = NULL;
 	obj->used = 0;
 
+	if (obj_allocs - 1 <= nr_objs * 2) {
+		int i, count = obj_allocs;
+		obj_allocs = (obj_allocs < 32 ? 32 : 2 * obj_allocs);
+		objs = xrealloc(objs, obj_allocs * sizeof(struct object *));
+		memset(objs + count, 0, (obj_allocs - count)
+				* sizeof(struct object *));
+		for (i = 0; i < obj_allocs; i++)
+			if (objs[i]) {
+				int j = find_object(objs[i]->sha1);
+				if (j != i) {
+					j = -1 - j;
+					objs[j] = objs[i];
+					objs[i] = NULL;
+				}
+			}
+	}
+
+	pos = find_object(sha1);
 	if (pos >= 0)
 		die("Inserting %s twice\n", sha1_to_hex(sha1));
 	pos = -pos-1;
 
-	if (obj_allocs == nr_objs) {
-		obj_allocs = alloc_nr(obj_allocs);
-		objs = xrealloc(objs, obj_allocs * sizeof(struct object *));
-	}
-
-	/* Insert it into the right place */
-	memmove(objs + pos + 1, objs + pos, (nr_objs - pos) * 
-		sizeof(struct object *));
-
 	objs[pos] = obj;
 	nr_objs++;
 }
diff --git a/object.h b/object.h
index 0e7618283c..e08afbd29f 100644
--- a/object.h
+++ b/object.h
@@ -23,7 +23,7 @@ struct object {
 };
 
 extern int track_object_refs;
-extern int nr_objs;
+extern int obj_allocs;
 extern struct object **objs;
 
 /** Internal only **/
diff --git a/t/t0000-basic.sh b/t/t0000-basic.sh
index bc3e711a52..c339a366f4 100755
--- a/t/t0000-basic.sh
+++ b/t/t0000-basic.sh
@@ -33,7 +33,7 @@ then
 fi
 
 merge >/dev/null 2>/dev/null
-if test $? == 127
+if test $? = 127
 then
 	echo >&2 'You do not seem to have "merge" installed.
 Please check INSTALL document.'
diff --git a/t/t3001-ls-files-others-exclude.sh b/t/t3001-ls-files-others-exclude.sh
index fde2bb25fa..6979b7c1c0 100755
--- a/t/t3001-ls-files-others-exclude.sh
+++ b/t/t3001-ls-files-others-exclude.sh
@@ -68,7 +68,7 @@ test_expect_success \
      diff -u expect output'
 
 # Test \r\n (MSDOS-like systems)
-echo -ne '*.1\r\n/*.3\r\n!*.6\r\n' >.gitignore
+printf '*.1\r\n/*.3\r\n!*.6\r\n' >.gitignore
 
 test_expect_success \
     'git-ls-files --others with \r\n line endings.' \