Optimize the argument and return data converters to be initialized only once and called for every iteration. This results in the same performance as for the specialized wiring models. The only exception is the vector argument and return types, which have a 40% performance decrease w.r.t. the specialized wiring model. But can still be optimized by using references for values stored in vectors. Anyway, we changed the default wiring model to the generalized wiring model now :)