Merge branch 'tb/ls-refs-optim'

The ls-refs protocol operation has been optimized to narrow the
sub-hierarchy of refs/ it walks to produce response.

* tb/ls-refs-optim:
  ls-refs.c: traverse prefixes of disjoint "ref-prefix" sets
  ls-refs.c: initialize 'prefixes' before using it
  refs: expose 'for_each_fullref_in_prefixes'

1 files changed, 5 insertions, 1 deletions

diff --git a/ls-refs.c b/ls-refs.c
index 7b9ae64..5ff5473 100644
--- a/ls-refs.c
+++ b/ls-refs.c
@@ -90,6 +90,7 @@ int ls_refs(struct repository *r, struct strvec *keys,
 	struct ls_refs_data data;
 
 	memset(&data, 0, sizeof(data));
+	strvec_init(&data.prefixes);
 
 	git_config(ls_refs_config, NULL);
 
@@ -109,7 +110,10 @@ int ls_refs(struct repository *r, struct strvec *keys,
 		die(_("expected flush after ls-refs arguments"));
 
 	head_ref_namespaced(send_ref, &data);
-	for_each_namespaced_ref(send_ref, &data);
+	if (!data.prefixes.nr)
+		strvec_push(&data.prefixes, "");
+	for_each_fullref_in_prefixes(get_git_namespace(), data.prefixes.v,
+				     send_ref, &data, 0);
 	packet_flush(1);
 	strvec_clear(&data.prefixes);
 	return 0;