Ruby Memory Management

def method(x)
  x.split( doesn't matter what the args are )
end

def method(x)
  x.gsub( doesn't matter what the args are )
end

students.each do |student|
  cloned_student = student.clone
  ...
  cloned_student.books.detect {...}
  ca_teachers = cloned_student.teachers.detect {|teacher| teacher.address.state == 'CA'}
  ca_teachers.blah_blah
  ...
  # Not sure if the following is necessary, but we have it just in case...
  cloned_student = nil
end

students.each do |student|
  loop_student = Student.find(student.id) # just re-find the record into local variable.
  ...
  loop_student.books.detect {...}
  ca_teachers = loop_student.teachers.detect {|teacher| teacher.address.state == 'CA'}
  ca_teachers.blah_blah
  ...
end