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The values of StaticPrintConfig derived objects were searched by a name walking through a huge chained if. Now they are being mapped with a std::map. Also initialization of StaticPrintConfig classes from their ConfigOptionDef defaults is done by maintaining a single global definition of each StaticPrintConfig derived class, and a new instance is initialized from this static copy. Also the ConfigOption instances are casted using static_cast wherever possible, and their types are verified by a virtual type() method. This approach avoids insiginificant performance penalty of a dynamic_cast. Also the compare and clone methods were added to ConfigOption, and the cloning & compare work on binary values, not by serialization.