Improvement
Instead of traversing and constructing a new set, share the set structure when constructing the pres_a set.
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@ -2390,13 +2390,8 @@ presence_broadcast_first(From, StateData, Packet) ->
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JIDs2Probe = format_and_check_privacy(From, StateData, Packet, JIDsProbe, out),
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Server = StateData#state.server,
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send_multiple(From, Server, JIDs2Probe, PacketProbe),
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{As, JIDs} =
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?SETS:fold(
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fun(JID, {A, JID_list}) ->
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{?SETS:add_element(JID, A), JID_list++[JID]}
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end,
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{StateData#state.pres_a, []},
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StateData#state.pres_f),
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As = StateData#state.pres_f, %%Reuse existing structure, don't create a new one
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JIDs = ?SETS:to_list(StateData#state.pres_f),
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JIDs2 = format_and_check_privacy(From, StateData, Packet, JIDs, out),
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Server = StateData#state.server,
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send_multiple(From, Server, JIDs2, Packet),
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