From a4bd12ed220b200c2f9c707fa399f6b32db27c92 Mon Sep 17 00:00:00 2001
From: Viktor Klang <viktor.klang@gmail.com>
Date: Thu, 15 Mar 2012 15:45:55 +0100
Subject: [PATCH] Switching to the faster append and removed a relative import

---
 akka-actor/src/main/scala/akka/event/EventBus.scala | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/akka-actor/src/main/scala/akka/event/EventBus.scala b/akka-actor/src/main/scala/akka/event/EventBus.scala
index bf19f5ed06..aee9eb787c 100644
--- a/akka-actor/src/main/scala/akka/event/EventBus.scala
+++ b/akka-actor/src/main/scala/akka/event/EventBus.scala
@@ -9,7 +9,7 @@ import akka.util.Index
 import java.util.concurrent.ConcurrentSkipListSet
 import java.util.Comparator
 import akka.util.{ Subclassification, SubclassifiedIndex }
-import collection.immutable.TreeSet
+import scala.collection.immutable.TreeSet
 
 /**
  * Represents the base type for EventBuses
@@ -247,7 +247,7 @@ trait ActorClassification { this: ActorEventBus with ActorClassifier ⇒
       case null ⇒
         if (monitored.isTerminated) false
         else {
-          if (mappings.putIfAbsent(monitored, TreeSet(monitor)) ne null) associate(monitored, monitor)
+          if (mappings.putIfAbsent(monitored, empty + monitor) ne null) associate(monitored, monitor)
           else if (monitored.isTerminated) !dissociate(monitored, monitor) else true
         }
       case raw: TreeSet[_] ⇒