Optimization started of EBEDD

akka-actor/src/main/scala/dispatch/ExecutorBasedEventDrivenDispatcher.scala

@@ -64,7 +64,7 @@ import java.util.concurrent.{ConcurrentLinkedQueue, LinkedBlockingQueue}
  */
 class ExecutorBasedEventDrivenDispatcher(
   _name: String,
-  throughput: Int = Dispatchers.THROUGHPUT,
+  val throughput: Int = Dispatchers.THROUGHPUT,
   mailboxConfig: MailboxConfig = Dispatchers.MAILBOX_CONFIG,
   config: (ThreadPoolBuilder) => Unit = _ => ()) extends MessageDispatcher with ThreadPoolBuilder {
 
@@ -109,7 +109,7 @@ class ExecutorBasedEventDrivenDispatcher(
             // Only dispatch if we got the lock. Otherwise another thread is already dispatching.
             lockAcquiredOnce = true
             try {
-              finishedBeforeMailboxEmpty = processMailbox(receiver)
+              finishedBeforeMailboxEmpty = processMailbox(receiver,mailbox)
             } finally {
               lock.unlock
               if (finishedBeforeMailboxEmpty) dispatch(receiver)
@@ -128,20 +128,24 @@ class ExecutorBasedEventDrivenDispatcher(
    *
    * @return true if the processing finished before the mailbox was empty, due to the throughput constraint
    */
-  def processMailbox(receiver: ActorRef): Boolean = {
+  def processMailbox(receiver: ActorRef,mailbox: MessageQueue): Boolean = {
+    val throttle = throughput > 0
     var processedMessages = 0
-    val mailbox = getMailbox(receiver)
-    var messageInvocation = mailbox.dequeue
-    while (messageInvocation != null) {
-      messageInvocation.invoke
-      processedMessages += 1
-      // check if we simply continue with other messages, or reached the throughput limit
-      if (throughput <= 0 || processedMessages < throughput) messageInvocation = mailbox.dequeue
-      else {
-        messageInvocation = null
-        return !mailbox.isEmpty
+    var nextMessage = mailbox.dequeue
+    if (nextMessage ne null) {
+      do {
+        nextMessage.invoke
+
+        if(throttle) { //Will be JIT:Ed away when false
+          processedMessages += 1
+          if (processedMessages >= throughput) //If we're throttled, break out
+            return !mailbox.isEmpty
+        }
+        nextMessage = mailbox.dequeue
       }
+      while (nextMessage ne null)
     }
+
     false
   }