- Optimized copying of FixedArray.

src/objects-inl.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 2277 matching lines @@
   WRITE_FIELD(this, kCodeCacheOffset, Heap::empty_fixed_array());
 }
 
 
 void JSArray::SetContent(FixedArray* storage) {
   set_length(Smi::FromInt(storage->length()));
   set_elements(storage);
 }
 
 
+Object* FixedArray::Copy() {
+  if (length() == 0) return this;
+  return Heap::CopyFixedArray(this);
+}
+
+
 #undef CAST_ACCESSOR
 #undef INT_ACCESSORS
 #undef SMI_ACCESSORS
 #undef ACCESSORS
 #undef FIELD_ADDR
 #undef READ_FIELD
 #undef WRITE_FIELD
 #undef WRITE_BARRIER
 #undef READ_MEMADDR_FIELD
 #undef WRITE_MEMADDR_FIELD
 #undef READ_DOUBLE_FIELD
 #undef WRITE_DOUBLE_FIELD
 #undef READ_INT_FIELD
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_