Allocate room for expected number of properties based on the...

src/string-stream.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 299 matching lines @@
             len = String::cast(key)->length();
           }
           for (; len < 18; len++)
             Put(' ');
           if (key->IsString()) {
             Put(String::cast(key));
           } else {
             key->ShortPrint();
           }
           Add(": ");
-          Object* value = js_object->properties()->get(r.GetFieldIndex());
+          Object* value = js_object->FastPropertyAt(r.GetFieldIndex());
           Add("%o\n", value);
         }
       }
       break;
       default:
       break;
     }
   }
 }
 
@@ skipping 210 matching lines @@
   unsigned new_bytes = *bytes * 2;
   if (new_bytes > size_) {
     new_bytes = size_;
   }
   *bytes = new_bytes;
   return space_;
 }
 
 
 } }  // namespace v8::internal