Per-frame delay, in microseconds. Default: 20000 (0.02 seconds.).
.TP 8
.B \-fps
-Whether to show a frames-per-second display at the bottom of the screen.
+Display the current frame rate, CPU load, and polygon count.
.TP 8
.B \-cutoff \fInumber\fP
If the frame rate we are achieving is lower than this, then panning,