Avoid linear search for non-locals in the scope code...

src/scopes.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 260 matching lines @@
   Handle<String> scope_name_;
 
   // The variables declared in this scope:
   // all user-declared variables (incl. parameters)
   LocalsMap locals_;
   // compiler-allocated (user-invisible) temporaries
   ZoneList<Variable*> temps_;
   // parameter list in source order
   ZoneList<Variable*> params_;
   // variables that must be looked up dynamically
-  ZoneList<Variable*> nonlocals_;
+  LocalsMap dynamics_;
+  LocalsMap dynamics_local_;
+  LocalsMap dynamics_global_;
   // unresolved variables referred to from this scope
   ZoneList<VariableProxy*> unresolved_;
   // declarations
   ZoneList<Declaration*> decls_;
   // convenience variable
   VariableProxy* receiver_;
   // function variable, if any; function scopes only
   Variable* function_;
   // convenience variable; function scopes only
   VariableProxy* arguments_;
@@ skipping 65 matching lines @@
   virtual VariableProxy* NewUnresolved(Handle<String> name, bool inside_with) {
     return NULL;
   }
   virtual VariableProxy* NewTemporary(Handle<String> name)  { return NULL; }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCOPES_H_