Cubase with Roland System-1 Software Synthesizer

Hi, I have a problem of cpu performance with this plugin “Roland System 1”. When I load the pluing, the CPU of the computer rooms at the top to the point that it is hard to work with.

Does anyone have the same problem with this plugin?

The nice Roland puts the problem to Daw software that is using the shell, washing their hands of any problem.
Is there anyone who has purchased this Plugin Roland?