public static object FastSetDictionaryValueOptimized(PythonType type, ref PythonDictionary dict, string name, object value, int keysVersion, int index) { if (dict == null) { Interlocked.CompareExchange(ref dict, type.MakeDictionary(), null); } CustomInstanceDictionaryStorage storage; if ((storage = dict._storage as CustomInstanceDictionaryStorage) != null && storage.KeyVersion == keysVersion) { storage.SetExtraValue(index, value); return(value); } else { return(dict[name] = value); } }