Optimization to atOwner

Moved costly hashMap updates into SuperAccessors from general tree transformers and replaced by immutable map.

1 files changed, 1 insertions, 6 deletions

diff --git a/src/compiler/scala/tools/nsc/transform/TypingTransformers.scala b/src/compiler/scala/tools/nsc/transform/TypingTransformers.scala
index 9e681b321c..82e95523d9 100644
--- a/src/compiler/scala/tools/nsc/transform/TypingTransformers.scala
+++ b/src/compiler/scala/tools/nsc/transform/TypingTransformers.scala
@@ -25,19 +25,14 @@ trait TypingTransformers {
     protected var curTree: Tree = _
     protected def typedPos(pos: Position)(tree: Tree) = localTyper typed { atPos(pos)(tree) }
 
-    /** a typer for each enclosing class */
-    val typers: mutable.Map[Symbol, analyzer.Typer] = new mutable.HashMap
-
-    override def atOwner[A](owner: Symbol)(trans: => A): A = atOwner(curTree, owner)(trans)
+    override final def atOwner[A](owner: Symbol)(trans: => A): A = atOwner(curTree, owner)(trans)
 
     def atOwner[A](tree: Tree, owner: Symbol)(trans: => A): A = {
       val savedLocalTyper = localTyper
 //      println("transformer atOwner: " + owner + " isPackage? " + owner.isPackage)
       localTyper = localTyper.atOwner(tree, if (owner.isModule) owner.moduleClass else owner)
-      typers += Pair(owner, localTyper)
       val result = super.atOwner(owner)(trans)
       localTyper = savedLocalTyper
-      typers -= owner
       result
     }