Dear All,
I'm a complete newbie in racket and need help in coding finite state 
machine/automata. Please pardon any of my ignorance.

Thanks to this post of Tim Thornton, I see a very good way to code FSM:
http://timthornton.net/blog/id/538fa6f2f09a16ba0674813d

I'd summarise it as following:
A finite state automaton has a number of states and each state has a name plus 
many transition rules. He structures it in racket as following:

(struct automaton (current-state states))
(struct state (name actions))
(struct action (event result))

A simple automaton can be like this:
(define simple-fsm (fsm 'A 
                        (list (fstate 'A (list (action 0 'A)
                                               (action 1 'B)))
                              (fstate 'B (list (action 0 'B)
                                               (action 1 'A))))))

The automaton is in state A which has 2 transition rules: 
- if event 1 happens, the automaton jumps to state B, 
- if event 0 happens, it stays in state A.

Then he writes some functions to update the automaton after each event (in the 
post). Plus this function he omits (I guess):
(define fsm-update-state old-fsm new-state)
  (struct-copy automaton old-fsm [current-state new-state]))
       
HERE IS THE QUESTION:

Using this way, after each event, there'd be a NEW automaton created. So I'm 
worried about scaling. I'd like to generate 100 automata. In each cycle, I'd 
pair the automata to interact for 50 times. Which means that there'd be 100 new 
automata created for every single cycle. And I'd like to run at least 1000 
cycles.

Would there be any problem with scaling? If yes, is there a way around this?

Any kind of comments and suggestions are welcomed and appreciated,
Thank you really much,
Chi

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