onCreate方法的上部和下部之间在性能上有区别吗？

Question

我的数组很长，我应该把这些数组文件放在哪一边作为性能。我应该将数组放在MainActivity还是onCreate下？

public class MainActivity extends AppCompatActivity implements 
     RewardedVideoAdListener {
           String[] sample={"sample text",",",",","",",",}
  @Override
          protected void onCreate(Bundle savedInstanceState){
String[] sample={"sample text",",",",","",",",}