Revert "op: low performance code (#102)"

This reverts commit c2248bed2b.

broker/lib/topics/memtopics.go

@@ -256,24 +256,16 @@ func (this *snode) smatch(topic []byte, qos byte, subs *[]interface{}, qoss *[]b
 		return err
 	}
 
-	// If the key is "#", then these subscribers are added to the result set
-	n, ok := this.snodes[MWC]
-	if ok {
-		n.matchQos(qos, subs, qoss)
-	}
-
-	n, ok = this.snodes[SWC]
-	if ok {
-		if err := n.smatch(rem, qos, subs, qoss); err != nil {
-			return err
-		}
-	}
-
 	level := string(ntl)
-	n, ok = this.snodes[level]
-	if ok {
-		if err := n.smatch(rem, qos, subs, qoss); err != nil {
-			return err
+
+	for k, n := range this.snodes {
+		// If the key is "#", then these subscribers are added to the result set
+		if k == MWC {
+			n.matchQos(qos, subs, qoss)
+		} else if k == SWC || k == level {
+			if err := n.smatch(rem, qos, subs, qoss); err != nil {
+				return err
+			}
 		}
 	}