Clojure refs and add-watch -

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say have ref state gets updated every 30 seconds , fn want attach may take longer complete. @ time 0 ref updated , fn called @ time 30 ref again updated fn still running. 2 copies of same function running or skip , execute @ time 60 assuming fn returns then?

edit: trying change state of ref. updated somewhere else trying use trigger control calculations.

if use ref 2 functions run in parallel , compete right produce next state of ref loser having run again.

this 1 of differences between refs , agents. agents run sequentially because have queue of functions waiting run on them.


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