diff --git a/akka-bench-jmh/src/main/scala/akka/actor/ActorBenchmark.scala b/akka-bench-jmh/src/main/scala/akka/actor/ActorBenchmark.scala
index f3543d0f68..b528163eea 100644
--- a/akka-bench-jmh/src/main/scala/akka/actor/ActorBenchmark.scala
+++ b/akka-bench-jmh/src/main/scala/akka/actor/ActorBenchmark.scala
@@ -35,7 +35,8 @@ class ActorBenchmark {
   @Param(Array("50"))
   var batchSize = 0
 
-  @Param(Array("akka.actor.ManyToOneArrayMailbox")) //  @Param(Array("akka.dispatch.SingleConsumerOnlyUnboundedMailbox", "akka.actor.ManyToOneArrayMailbox"))
+  //@Param(Array("akka.actor.ManyToOneArrayMailbox"))
+  @Param(Array("akka.dispatch.SingleConsumerOnlyUnboundedMailbox", "akka.actor.ManyToOneArrayMailbox", "akka.actor.JCToolsMailbox"))
   var mailbox = ""
 
   @Param(Array("fjp-dispatcher")) //  @Param(Array("fjp-dispatcher", "affinity-dispatcher"))
diff --git a/akka-bench-jmh/src/main/scala/akka/actor/ForkJoinActorBenchmark.scala b/akka-bench-jmh/src/main/scala/akka/actor/ForkJoinActorBenchmark.scala
index c076a56b8b..202d310f67 100644
--- a/akka-bench-jmh/src/main/scala/akka/actor/ForkJoinActorBenchmark.scala
+++ b/akka-bench-jmh/src/main/scala/akka/actor/ForkJoinActorBenchmark.scala
@@ -22,13 +22,13 @@ import scala.concurrent.duration._
 class ForkJoinActorBenchmark {
   import ForkJoinActorBenchmark._
 
-  @Param(Array("5", "25", "50"))
+  @Param(Array("50"))
   var tpt = 0
 
   @Param(Array(coresStr)) // coresStr, cores2xStr, cores4xStr
   var threads = ""
 
-  @Param(Array("SingleConsumerOnlyUnboundedMailbox")) //"default"
+  @Param(Array("akka.dispatch.SingleConsumerOnlyUnboundedMailbox", "akka.actor.ManyToOneArrayMailbox", "akka.actor.JCToolsMailbox"))
   var mailbox = ""
 
   implicit var system: ActorSystem = _
@@ -38,27 +38,22 @@ class ForkJoinActorBenchmark {
 
     requireRightNumberOfCores(cores)
 
-    val mailboxConf = mailbox match {
-      case "default" ⇒ ""
-      case "SingleConsumerOnlyUnboundedMailbox" ⇒
-        s"""default-mailbox.mailbox-type = "${classOf[akka.dispatch.SingleConsumerOnlyUnboundedMailbox].getName}""""
-    }
-
     system = ActorSystem("ForkJoinActorBenchmark", ConfigFactory.parseString(
       s"""
         akka {
-          log-dead-letters = off
+           log-dead-letters = off
+           default-mailbox.mailbox-capacity = 512
            actor {
-             default-dispatcher {
+             fjp-dispatcher {
                executor = "fork-join-executor"
                fork-join-executor {
                  parallelism-min = $threads
-                 parallelism-factor = 1
+                 parallelism-factor = 1.0
                  parallelism-max = $threads
                }
                throughput = $tpt
+               mailbox-type = "$mailbox"
              }
-             $mailboxConf
            }
          }
       """
@@ -71,21 +66,21 @@ class ForkJoinActorBenchmark {
     Await.ready(system.whenTerminated, 15.seconds)
   }
 
-  @Benchmark
-  @OperationsPerInvocation(totalMessagesTwoActors)
-  def pingPong(): Unit = benchmarkPingPongActors(messages, twoActors, "default-dispatcher", tpt, timeout)
+  //  @Benchmark
+  //  @OperationsPerInvocation(totalMessagesTwoActors)
+  //  def pingPong(): Unit = benchmarkPingPongActors(messages, twoActors, "fjp-dispatcher", tpt, timeout)
 
   @Benchmark
   @OperationsPerInvocation(totalMessagesLessThanCores)
-  def pingPongLessActorsThanCores(): Unit = benchmarkPingPongActors(messages, lessThanCoresActors, "default-dispatcher", tpt, timeout)
+  def pingPongLessActorsThanCores(): Unit = benchmarkPingPongActors(messages, lessThanCoresActors, "fjp-dispatcher", tpt, timeout)
 
-  @Benchmark
-  @OperationsPerInvocation(totalMessagesSameAsCores)
-  def pingPongSameNumberOfActorsAsCores(): Unit = benchmarkPingPongActors(messages, sameAsCoresActors, "default-dispatcher", tpt, timeout)
+  //  @Benchmark
+  //  @OperationsPerInvocation(totalMessagesSameAsCores)
+  //  def pingPongSameNumberOfActorsAsCores(): Unit = benchmarkPingPongActors(messages, sameAsCoresActors, "fjp-dispatcher", tpt, timeout)
 
   @Benchmark
   @OperationsPerInvocation(totalMessagesMoreThanCores)
-  def pingPongMoreActorsThanCores(): Unit = benchmarkPingPongActors(messages, moreThanCoresActors, "default-dispatcher", tpt, timeout)
+  def pingPongMoreActorsThanCores(): Unit = benchmarkPingPongActors(messages, moreThanCoresActors, "fjp-dispatcher", tpt, timeout)
 
   //  @Benchmark
   //  @Measurement(timeUnit = TimeUnit.MILLISECONDS)
diff --git a/akka-bench-jmh/src/main/scala/akka/actor/JCToolsMailbox.scala b/akka-bench-jmh/src/main/scala/akka/actor/JCToolsMailbox.scala
new file mode 100644
index 0000000000..462059e2a1
--- /dev/null
+++ b/akka-bench-jmh/src/main/scala/akka/actor/JCToolsMailbox.scala
@@ -0,0 +1,50 @@
+/**
+ * Copyright (C) 2017-2018 Lightbend Inc. <https://www.lightbend.com>
+ */
+
+package akka.actor
+
+import akka.dispatch.MailboxType
+import akka.dispatch.ProducesMessageQueue
+import akka.dispatch.BoundedNodeMessageQueue
+import com.typesafe.config.Config
+import akka.dispatch.MessageQueue
+import akka.dispatch.BoundedMessageQueueSemantics
+import scala.concurrent.duration.Duration
+import akka.dispatch.Envelope
+import org.jctools.queues.MpscGrowableArrayQueue
+import scala.annotation.tailrec
+
+case class JCToolsMailbox(val capacity: Int) extends MailboxType with ProducesMessageQueue[BoundedNodeMessageQueue] {
+
+  def this(settings: ActorSystem.Settings, config: Config) = this(config.getInt("mailbox-capacity"))
+
+  if (capacity < 0) throw new IllegalArgumentException("The capacity for JCToolsMailbox can not be negative")
+
+  final override def create(owner: Option[ActorRef], system: Option[ActorSystem]): MessageQueue =
+    new JCToolsMessageQueue(capacity)
+}
+
+class JCToolsMessageQueue(capacity: Int) extends MpscGrowableArrayQueue[Envelope](capacity) with MessageQueue with BoundedMessageQueueSemantics {
+  final def pushTimeOut: Duration = Duration.Undefined
+
+  final def enqueue(receiver: ActorRef, handle: Envelope): Unit =
+    if (!offer(handle))
+      receiver.asInstanceOf[InternalActorRef].provider.deadLetters.tell(
+        DeadLetter(handle.message, handle.sender, receiver), handle.sender
+      )
+
+  final def dequeue(): Envelope = poll()
+
+  final def numberOfMessages: Int = size()
+
+  final def hasMessages: Boolean = !isEmpty()
+
+  @tailrec final def cleanUp(owner: ActorRef, deadLetters: MessageQueue): Unit = {
+    val envelope = dequeue()
+    if (envelope ne null) {
+      deadLetters.enqueue(owner, envelope)
+      cleanUp(owner, deadLetters)
+    }
+  }
+}
diff --git a/project/Dependencies.scala b/project/Dependencies.scala
index 345bfb3f5f..d64c55eee7 100644
--- a/project/Dependencies.scala
+++ b/project/Dependencies.scala
@@ -58,6 +58,8 @@ object Dependencies {
 
     val sigar = "org.fusesource" % "sigar" % "1.6.4" // ApacheV2
 
+    val jctools = "org.jctools" % "jctools-core" % "2.1.1" // ApacheV2
+
     // reactive streams
     val reactiveStreams = "org.reactivestreams" % "reactive-streams" % "1.0.2" // CC0
 
@@ -172,7 +174,7 @@ object Dependencies {
 
   val contrib = l ++= Seq(Test.commonsIo)
 
-  val benchJmh = l ++= Seq(Provided.levelDB, Provided.levelDBNative)
+  val benchJmh = l ++= Seq(Provided.levelDB, Provided.levelDBNative, Compile.jctools)
 
   // akka stream