rec: Compare the CacheKey type and place first then the name

We don't care about the actual ordering, so let's do the cheapest
comparisons first then the quite expensive DNSName comparison only
if we really need to.

diff --git a/pdns/syncres.cc b/pdns/syncres.cc
index dcdcc1ce0ba9ac811186099f3d2ddbff4c7080fc..baca8d53dd24ec08aae9873cd6d125e841994b59 100644 (file)
--- a/pdns/syncres.cc
+++ b/pdns/syncres.cc
@@ -1106,7 +1106,7 @@ struct CacheKey
   uint16_t type;
   DNSResourceRecord::Place place;
   bool operator<(const CacheKey& rhs) const {
-    return tie(name, type, place) < tie(rhs.name, rhs.type, rhs.place);
+    return tie(type, place, name) < tie(rhs.type, rhs.place, rhs.name);
   }
 };
 typedef map<CacheKey, CacheEntry> tcache_t;