+CLI: Simulation Speed
+---------------------
+
+If neither of the following two options are passed, the simulation runs as
+though `-delay 25000` was passed.
+
+ - **`-random-delay`**: A random delay is selected, but not truly random. For
+ more details, read `WolframAutomata.c` starting around the comment, "When
+ randomly setting the delay, the problem is to avoid ..."
+
+ - **`-delay N`**: Request `N` microsecond delay between each frame/generation
+ of the simulation. Note that this is only a request; XScreensaver reserves
+ the right to ignore requested values, and of course we execute at the mercy
+ of the kernel's scheduling. In practice, non-absurd values are reasonably
+ well respected.
+
+