What is the advantage of running the virtual user as thread?

VuGen provides the facility to use multithreading. This enables more virtual user to be run per generator. If the Vuser is run as a process, the same driver program is loaded into memory for each Vuser, thus taking up a large amount of memory. This limits the number of virtual user that can be run on a single generator. If the Vuser is run as a thread, only one instance of the driver program is loaded into memory for the given number of virtual user (say 100). Each thread shares the memory of the parent driver program, thus enabling more virtual user to be run per generator