In a list always show a column at top

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LINQ

C#5.0

EF6.0

I have a List of Student which I am getting from table Student.
In that table I have two column IsTopper and IsLoser both are bool.
Now in listOfStudent I want IsTopper at top and Is loser at bottom
for this I can use Orderby
Like this

public List<Student> GetAllStudent()
        {
            return unitOfWork.StudentRepository.All().OrderBy(s => s.IsLoser ).OrderByDescending(s => s.IsTopper).ToList();
        }

it will hurt performance
is there any other way to get isTopper at top and is Loser at bottom?