This contains a simple performance test for the simulator.  To test the
integer simulator type `make int'.  To test the floating point version type
`make float'.  You will find executable `sim' or `fsim' has been made.  Run it.
When the command prompt appears, type `call build'.  You will be asked
how many units you want and how many links per unit.  As a rough guide,
if you have N megabytes of memory on your machine, then the product of
#units * #links should not be more than 30,000 * N.  So 1 meg gets you
say 500 units with 60 links each or 1500 with 20 links each, etc.

When the net is built, it will tell you how long the building took.  Try
it with `debug' set to `on' and `off' to see how much longer it takes when
construction checking is on.  Each unit has however many links you specified,
from a random source.

Set `echo' to off.  Then run the network for 10 steps with `go 10'.  See
how long it takes.  If it takes more than 10 seconds, try `go clock 10' to
get the exact timing (in seconds!).
