The new implementation of score loading is memory hungry, as it stores the whole score file in memory. For large score files that have long `client_id`'s and `label`'s, this might easily be too much for a normal desktop machine. To split the score file into positives and negatives, most of the information (for example, the `label`s) is completely irrelevan. I remember that I have had this problem with an older version of `bob.measure`, and this is why I have implemented the score reading using a generator function (i.e., `yield`'ing the file line by line) instead of keeping all information of the score file at the same time. I will provide a better alternative of the 'load_scores' function as a generator function, which does not store the whole score file in memory.