Attempt #2 to optimize findMember

Author: odersky

src/compiler/scala/tools/nsc/Driver.scala

@@ -1,10 +1,12 @@
 package scala.tools.nsc
 
 import scala.tools.nsc.reporters.{Reporter, ConsoleReporter}
-import Properties.{ versionString, copyrightString }
+import Properties.{ versionString, copyrightString, residentPromptString }
 import scala.reflect.internal.util.{ BatchSourceFile, FakePos }
 
 abstract class Driver {
+  
+  val prompt = residentPromptString
 
   val versionMsg = "Scala compiler " +
     versionString + " -- " +

src/compiler/scala/tools/nsc/Main.scala

@@ -12,15 +12,13 @@ import scala.tools.nsc.interactive.{ RefinedBuildManager, SimpleBuildManager }
 import scala.tools.nsc.io.AbstractFile
 import scala.tools.nsc.reporters.{Reporter, ConsoleReporter}
 import scala.reflect.internal.util.{ BatchSourceFile, FakePos } //{Position}
-import Properties.{ versionString, copyrightString, residentPromptString, msilLibPath }
+import Properties.msilLibPath
 
 /** The main class for NSC, a compiler for the programming
- *  language Scala.
+ *  language Scala. 
  */
 object Main extends Driver with EvalLoop {
 
-  val prompt = residentPromptString
-
   def resident(compiler: Global) {
     loop { line =>
       val args = line.split(' ').toList

src/reflect/scala/reflect/internal/Types.scala

@@ -1054,7 +1054,7 @@ trait Types extends api.Types { self: SymbolTable =>
         while (!bcs.isEmpty) {
           val decls = bcs.head.info.decls
           var entry =
-            if (name == nme.ANYNAME) decls.elems 
+            if (name eq nme.ANYNAME) decls.elems 
             else if ((fingerPrint & decls.fingerPrints) == 0) null
             else decls.lookupEntry(name)
           while (entry ne null) {
@@ -1070,12 +1070,12 @@ trait Types extends api.Types { self: SymbolTable =>
                   Statistics.popTimer(typeOpsStack, start)
                   if (suspension ne null) suspension foreach (_.suspended = false)
                   return sym
-                } else if (member == NoSymbol) {
+                } else if (member eq NoSymbol) {
                   member = sym
                 } else if (members eq null) {
-                  if (member.name != sym.name ||
-                      !(member == sym ||
-                        member.owner != sym.owner &&
+                  if ((member.name ne sym.name) ||
+                      !((member eq sym) ||
+                        (member.owner ne sym.owner) &&
                         !sym.isPrivate && {
                           if (self eq null) self = this.narrow
                           if (membertpe eq null) membertpe = self.memberType(member)
@@ -1089,8 +1089,8 @@ trait Types extends api.Types { self: SymbolTable =>
                   var prevEntry = members.lookupEntry(sym.name)
                   var symtpe: Type = null
                   while ((prevEntry ne null) &&
-                         !(prevEntry.sym == sym ||
-                           prevEntry.sym.owner != sym.owner &&
+                         !((prevEntry.sym eq sym) ||
+                           (prevEntry.sym.owner ne sym.owner) &&
                            !sym.hasFlag(PRIVATE) && {
                              if (self eq null) self = this.narrow
                              if (symtpe eq null) symtpe = self.memberType(sym)