- Optimized CopyFixedArray and CopyJSObject.

src/objects.cc

 // 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 892 matching lines @@
   return Heap::Object_symbol();
 }
 
 
 void JSObject::JSObjectIterateBody(int object_size, ObjectVisitor* v) {
   // Iterate over all fields in the body. Assumes all are Object*.
   IteratePointers(v, kPropertiesOffset, object_size);
 }
 
 
-Object* JSObject::Copy(PretenureFlag pretenure) {
-  // Never used to copy functions.  If functions need to be copied we
-  // have to be careful to clear the literals array.
-  ASSERT(!IsJSFunction());
-
-  // Copy the elements and properties.
-  Object* elem = FixedArray::cast(elements())->Copy();
-  if (elem->IsFailure()) return elem;
-  Object* prop = properties()->Copy();
-  if (prop->IsFailure()) return prop;
-
-  // Make the clone.
-  Object* clone = (pretenure == NOT_TENURED) ?
-      Heap::Allocate(map(), NEW_SPACE) :
-      Heap::Allocate(map(), OLD_POINTER_SPACE);
-  if (clone->IsFailure()) return clone;
-  JSObject::cast(clone)->CopyBody(this);
-
-  // Set the new elements and properties.
-  JSObject::cast(clone)->set_elements(FixedArray::cast(elem));
-  JSObject::cast(clone)->set_properties(FixedArray::cast(prop));
-
-  // Return the new clone.
-  return clone;
-}
-
-
 Object* JSObject::AddFastPropertyUsingMap(Map* new_map,
                                           String* name,
                                           Object* value) {
   int index = new_map->PropertyIndexFor(name);
   if (map()->unused_property_fields() == 0) {
     ASSERT(map()->unused_property_fields() == 0);
     int new_unused = new_map->unused_property_fields();
     Object* values =
         properties()->CopySize(properties()->length() + new_unused + 1);
     if (values->IsFailure()) return values;
@@ skipping 5594 matching lines @@
   // No break point.
   if (break_point_objects()->IsUndefined()) return 0;
   // Single beak point.
   if (!break_point_objects()->IsFixedArray()) return 1;
   // Multiple break points.
   return FixedArray::cast(break_point_objects())->length();
 }
 
 
 } }  // namespace v8::internal