thanks for the answer. I tried the formula and it works, but it is not really faster . I think so too, that it is coming from DPA calculation.
Other question : all my measures are in one table. if i choose a measure and insert this into a matrix, are the other measures also calculated ( the one in the table but not in the matrix visualisation?)
does it make a difference if i have 1 table with all measures or more tables with the measures?