From c6ab269b994cc385a8c4a886b227f4f2e1e1ebee Mon Sep 17 00:00:00 2001
From: Johannes Rudolph <johannes.rudolph@gmail.com>
Date: Thu, 9 Mar 2017 16:08:12 +0100
Subject: [PATCH] =str optimize Keep.none

---
 .../src/main/scala/akka/stream/impl/TraversalBuilder.scala      | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/akka-stream/src/main/scala/akka/stream/impl/TraversalBuilder.scala b/akka-stream/src/main/scala/akka/stream/impl/TraversalBuilder.scala
index a4a78adc93..bb69f09e49 100644
--- a/akka-stream/src/main/scala/akka/stream/impl/TraversalBuilder.scala
+++ b/akka-stream/src/main/scala/akka/stream/impl/TraversalBuilder.scala
@@ -519,6 +519,8 @@ object LinearTraversalBuilder {
       Pop.concat(t)
     else if (matCompose eq Keep.right)
       t.concat(Pop)
+    else if (matCompose eq Keep.none)
+      t.concat(Pop).concat(Pop).concat(PushNotUsed)
     else
       t.concat(ComposeReversed(matCompose))
   }