In this section:
%ns (Disable Screen Saver) is designed to cause screen saver activity to be inhibited while the window is open. If your application opens a window and then performs a long calculation, there is a danger that a screen saver will cut in when your program yields, even temporarily. This is because the operating system considers the system to be idle if there is no input for a set period of time. Many screen savers are very CPU intensive and will starve your program of CPU resources. Use %ns to eliminate this problem.