Module placement effect on system performance

Whether the placement of a module affects system performance depends on how many address spaces use the module and on how often the module is used. Placement of infrequently-used modules that are used by few address spaces have little effect on system-wide performance or on the performance of address spaces that do not use the modules. Placement of frequently-used modules used by a large number of address spaces, particularly those used by a number of address spaces at the same time, can substantially affect system performance.