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fetch-pack: sort incoming heads

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There's no reason to preserve the incoming order of the
heads we're requested to fetch. By having them sorted, we
can replace some of the quadratic algorithms with linear
ones.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2012-05-21 18:17:02 -04:00 committed by Junio C Hamano
parent aa3bb87176
commit 443596850f
1 changed files with 9 additions and 1 deletions
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10
builtin/fetch-pack.c
View file

@ -1057,6 +1057,11 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
return ret;
}
static int compare_heads(const void *a, const void *b)
{
return strcmp(*(const char **)a, *(const char **)b);
}
struct ref *fetch_pack(struct fetch_pack_args *my_args,
int fd[], struct child_process *conn,
const struct ref *ref,
@ -1076,8 +1081,11 @@ struct ref *fetch_pack(struct fetch_pack_args *my_args,
st.st_mtime = 0;
}
if (heads && nr_heads)
if (heads && nr_heads) {
nr_heads = remove_duplicates(nr_heads, heads);
qsort(heads, nr_heads, sizeof(*heads), compare_heads);
}
if (!ref) {
packet_flush(fd[1]);
die("no matching remote head");