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Reconsider the layout of your data 23/07/2012:08:37:15

If you put your data into classes, then you're limited to the basic structures available, namely fields as constants in your classes. Runtime changes to the structure of a class are very difficult to achieve with C++ without invoking arcane and hard to debug techniques. With blobs, or a simpler access pattern such as a free function to get a variable, then you can reimagine the data structures in new ways.