What’s the best way to do something periodically in Erlang?

by

Use timer:send_interval/2. E.g.:

-behavior(gen_server).

interval_milliseconds()-> 15000.
init()->
    timer:send_interval(interval_milliseconds(), interval),
    {ok, FascinatingStateData}.

%% this clause will be called every 15 seconds
handle_info(interval, StateData)->
    State2 = do_some_work(StateData)
    {noreply, State2}.

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