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authorLennart Poettering <lennart@poettering.net>2015-12-09 17:28:50 +0100
committerLennart Poettering <lennart@poettering.net>2015-12-10 11:28:01 +0100
commit4d247a6cd3f69acbc5a09e8ac7e4fbb50eaa3228 (patch)
tree048375d3253375464dd0e204cb480e3a7f5d3372 /src
parentc84e853934cf99a737ef7d3f4ee5d61a1a2a5696 (diff)
resolved: shortcut RR comparisons if pointers match
When iterating through RR lists we frequently end up comparing RRs and RR keys with themselves, hence att a minor optimization to check ptr values first, before doing a deep comparison.
Diffstat (limited to 'src')
-rw-r--r--src/resolve/resolved-dns-rr.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-rr.c b/src/resolve/resolved-dns-rr.c
index 934a18334c..260a2a3bd6 100644
--- a/src/resolve/resolved-dns-rr.c
+++ b/src/resolve/resolved-dns-rr.c
@@ -168,6 +168,9 @@ bool dns_resource_key_is_address(const DnsResourceKey *key) {
int dns_resource_key_equal(const DnsResourceKey *a, const DnsResourceKey *b) {
int r;
+ if (a == b)
+ return 1;
+
r = dns_name_equal(DNS_RESOURCE_KEY_NAME(a), DNS_RESOURCE_KEY_NAME(b));
if (r <= 0)
return r;
@@ -187,6 +190,9 @@ int dns_resource_key_match_rr(const DnsResourceKey *key, const DnsResourceRecord
assert(key);
assert(rr);
+ if (key == rr->key)
+ return 1;
+
/* Checks if an rr matches the specified key. If a search
* domain is specified, it will also be checked if the key
* with the search domain suffixed might match the RR. */
@@ -503,6 +509,9 @@ int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecor
assert(a);
assert(b);
+ if (a == b)
+ return 1;
+
r = dns_resource_key_equal(a->key, b->key);
if (r <= 0)
return r;
@@ -1090,6 +1099,9 @@ DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i) {
bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b) {
+ if (a == b)
+ return true;
+
if (!a != !b)
return false;