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[This is a work in progress.]
== Overview ==
Previously, Gramps was a very modular design when it comes to accessing the data. For example, consider getting the People for the flat view. First we get a cursor that iterates over the data. Then we sort it, on whatever criteria we have requested. To sort the data, not only do we need to iterate over all of the data, but we need to unpickle and turn the raw data into Person objects. Of course, it would be much faster if we can store the order in an index, so that we can just get the data that we need. This is even more important when we only want to see a filtered segment of the database, say those people who have a surname of "Smith."