for (Person person : personList) {
          for (int i = 0; i < anotherList.size(); i++) {
              if (String.valueOf(person.getId()).equals(
                      String.valueOf(anotherList.get(i)
                              .getPerson().getId()))) {

                  updateCount(person); // It is the task taking too much time

                if(person.getCount > 0)
                      list.add(person);


          }
    for (int i = 0; i < anotherList2.size(); i++) {
              if (String.valueOf(person.getId()).equals(
                      String.valueOf(anotherList2.get(i)
                              .getPerson().getId()))) {

                  updateCount(person); // It is the task taking too much time

                if(person.getCount > 0)
                      list2.add(person);


          }

      }