FEA demos much slower on v9 than v6

[JasGarnier]

I downloaded the v6 pre-compiled package then I downloaded v9 source and compiled with visual C 2022. All fea demos are much slower in v9. I see that with the v6 visualisation demo the cpu is at 100% all the time and the gpu is at 12%. With v9 cpu usage fluctuates between 50 and 70% which gpu usage is 1 to 2%. I read a previous query where it was recommened to add the sys.SetNumThreads() command which I did but it made zero difference. What else might be the trouble?