Dynamically determine optimal instance size....

test/cctest/test-api.cc

 // Copyright 2007-2009 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 10929 matching lines @@
 
   // Use a simple object as prototype.
   v8::Local<v8::Object> prototype = v8::Object::New();
   prototype->Set(v8_str("y"), v8_num(42));
   context->Global()->Set(v8_str("P"), prototype);
 
   // This compile will add the code to the compilation cache.
   CompileRun(source);
 
   script = v8::Script::Compile(v8_str("new C1();"));
-  for (int i = 0; i < 10; i++) {
+  // Allow enough iterations for the inobject slack tracking logic
+  // to finalize instance size and install the fast construct stub.
+  for (int i = 0; i < 256; i++) {
     v8::Handle<v8::Object> c1 = v8::Handle<v8::Object>::Cast(script->Run());
     CHECK_EQ(23, c1->Get(v8_str("x"))->Int32Value());
     CHECK_EQ(42, c1->Get(v8_str("y"))->Int32Value());
   }
 
   // Use an API object with accessors as prototype.
   Local<ObjectTemplate> templ = ObjectTemplate::New();
   templ->SetAccessor(v8_str("x"),
                      GetterWhichReturns42,
                      SetterWhichSetsYOnThisTo23);
@@ skipping 409 matching lines @@
 
   {
     // Change the Boolean.prototype in the second context and check
     // that the right function gets called.
     v8::HandleScope scope;
     LocalContext context2;
     CompileRun("Boolean.prototype.toString = function() { return \"\"; }");
     ExpectString(code, "");
   }
 }