In one example, a data processing method is provided for the time-optimized calculation of a large number of result data sets at the end of a period. The calculation can be based on data. A time span can be determined for which the underlying data are to be taken into consideration. For each result data set, the probability that the data underlying the calculation of the respective result data set are changed between the calculation of the result data set and the end of the period can be detected. Result data sets within the time span can be calculated. Those result data sets of which the data underlying the calculation have a minor probability of being changed can be calculated prior to those result data sets of which the data underlying the calculation have a higher probability of being changed. The data sets can be stored.