Hi I am using Drab for live updating page.
in commander file

defhandler show_dashboard_stats(socket, sender) do
    order_id = sender.params["campaign_id"]

    user_id = socket.assigns.current_user_id

    order = Sales.get_order_by_id(order_id, user_id)

    message_status = Messenger.get_all_message_status(order_id)

    total_sent = Enum.count(message_status)

    deilvered_count = Analytics.get_delivered_message_status_count(message_status)

    undelivered_count = Analytics.get_undelivered_message_status_count(message_status)

    bitly = Bitly.get_bitly_by_order_id(order_id)

    total_clicks = Analytics.load_clicks(bitly)

    IO.puts(" ++++++++++++ poking +++++++++++++")
    poke(socket,
      total_sent: total_sent,
      deilvered_count: deilvered_count,
      undelivered_count: undelivered_count,
      total_clicks: total_clicks
    )
   IO.puts("+++++++++++++ poking is done ++++++++++")
    socket |> exec_js!("DashboardChart.update()")
  end

In local server it tooks less than second. but in production it took more than 5 seconds.
I tried to find where is bottleneck and checked function execution time.
Longest time I measured was 1 second from Analytics.load_clicks(bitly) (this function does external api request)

I added IO.puts function before and after poke. and it took more than 5 seconds to print “poking is done”
I think “poke” is the one cause the problem.

Am I correct?
I deployed in Heroku and using Hobby dynos