Xtoolwait notably decreases the startup time of an X session by reducing the load on the X server and the OS.
It starts an X client in the background, waits for a window to be mapped on the root window, and then exits. It can improve performance for users who start a bunch of X clients automatically (for example, xterm, xlock, xconsole, whatever) when the X session starts.
- original homepage (archived)
2007-07-14 - 1.3 on PCLinuxOS 2007
See my .xinitrc for how I use it.