Remove a runtime Cons allocation.

typelevel · Feb 3, 2016 · e180959 · e180959
1 parent 68d6062
commit e180959
Show file tree

Hide file tree

Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/core/src/main/scala/cats/data/Streaming.scala b/core/src/main/scala/cats/data/Streaming.scala
@@ -534,7 +534,7 @@ sealed abstract class Streaming[A] extends Product with Serializable { lhs =>
     this match {
       case Empty() => Empty()
       case Wait(lt) => Wait(lt.map(_.dropWhile(f)))
-      case Cons(a, lt) => if (f(a)) Wait(lt.map(_.dropWhile(f))) else Cons(a, lt)
+      case s @ Cons(a, lt) => if (f(a)) Wait(lt.map(_.dropWhile(f))) else s
     }
 
   /**

diff --git a/core/src/main/scala/cats/data/StreamingT.scala b/core/src/main/scala/cats/data/StreamingT.scala
@@ -255,7 +255,7 @@ sealed abstract class StreamingT[F[_], A] extends Product with Serializable { lh
    */
   def dropWhile(f: A => Boolean)(implicit ev: Functor[F]): StreamingT[F, A] =
     this match {
-      case Cons(a, ft) => if (f(a)) Wait(ft.map(_.dropWhile(f))) else Cons(a, ft)
+      case s @ Cons(a, ft) => if (f(a)) Wait(ft.map(_.dropWhile(f))) else s
       case Wait(ft) => Wait(ft.map(_.dropWhile(f)))
       case Empty() => Empty()
     }