What is "GUI time" in RFC ?

Hello !

I have a question about performance monitoring in ST03 / STAD.

I thought that "GUI time" only applies to Dialog Task type, but now I see that for Task type RFC this timeis also notequal to zero.

Also in some STAD records for program "RFC" GUI time isn't 0. It seems to methat this happenswhen the RFC destination is NONE.

An example ofsuch a record:

 

What is "GUI time" in this record ?