This resulted in _quadratic_ complexity if data points where retrieved one-by-one. For the Norne case, this had the consequence that retrieving the data for ZCORN (-> about 1M data points) took hours...
This resulted in _quadratic_ complexity if data points where retrieved one-by-one. For the Norne case, this had the consequence that retrieving the data for ZCORN (-> about 1M data points) took hours...