Have some performance issues on Windows XP, too.
I am using d3d prism settings to render on Windows 7 and XP. On Windows 7 everything working fine.
On Windows XP it is slow and sometimes flickering.
I didn't find a solution.
1) Tried to start the application with other prism settings like -Dprism.order=d2d and OpenGL.
2) I changed the 3d graphic settings that made it better, but didn't solve the issue.
Someone knows the difference of rendering the javafx application in Windows 7 and XP (DirectX 11, DirectX9.0c)?