optimize reserve memory in RandomAssigner
optimize reserve memory in RandomAssigner

raesjo/SKIRTcorona,raesjo/SKIRT,SKIRT/SKIRT,raesjo/SKIRT,raesjo/SKIRTcorona,SKIRT/SKIRT,SKIRT/SKIRT,raesjo/SKIRTcorona,raesjo/SKIRT