--- Set the maximum number of frames that can be drawn per second. A value
--- of 50 is pretty good. If your computer is really old, you can get away
--- with decreasing this value and still have reasonably smooth animation.
--- You can set this to a very high number to effectively render as many
--- frames as is possible, but the actual rate could be limited by vertical
--- display synchronization, depending on the X11 driver and settings used.
--- You should not set this option higher than the point where the vertical
--- synchronization effectively limits the draw rate or else the game may
--- not be able to update the physics on schedule which could actually
--- significantly lower the quality of the animation.
+-- Set the target number of frames that should be drawn per second. The
+-- smoothness of the animation increases as you increase this value. You
+-- probably want to set this somewhere in the 25-85 range, depending on how
+-- much work you want your computer to do. For example, if you're on
+-- battery power, you might prefer 25 which is still reasonably smooth and
+-- will decrease battery drain significantly. You can also set this to a
+-- very high number to effectively draw as many frames as possible, but
+-- your actual framerate might be limited by the refresh rate of your
+-- display--use the swapcontrol setting to enable or disable this behavior.
+-- You can determine your actual framerate with the showfps option.