Hello Alistu,
Well may be but i have seen other softwares like CST , CAD feiko take days for simulation for just one filter and if you compare optisystem with those it is lightening fast. So as if you ask me i would be happy if my simulation takes even 20 minutes.
And as far as optisystem is concerned,, sweeping many parameters at same time takes more time rather than number of components.
Regards