Software / code / prosody
Diff
plugins/mod_carbons.lua @ 10469:658b759a1f7a
mod_carbons: Improve performance by delaying creation of carbon payload
If there are no other sessions which also enabled carbons then the
carbons wrapper is not used and the potentially expensive clone
operation was a waste of cycles.
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Sat, 30 Nov 2019 19:34:40 +0100 |
| parent | 8354:b41947a0fc0c |
| child | 10778:a62b981db0e2 |
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--- a/plugins/mod_carbons.lua Sat Nov 30 16:40:04 2019 +0100 +++ b/plugins/mod_carbons.lua Sat Nov 30 19:34:40 2019 +0100 @@ -74,17 +74,7 @@ return end - -- Create the carbon copy and wrap it as per the Stanza Forwarding XEP - local copy = st.clone(stanza); - if c2s and not orig_to then - stanza.attr.to = bare_from; - end - copy.attr.xmlns = "jabber:client"; - local carbon = st.message{ from = bare_jid, type = orig_type, } - :tag(c2s and "sent" or "received", { xmlns = xmlns_carbons }) - :tag("forwarded", { xmlns = xmlns_forward }) - :add_child(copy):reset(); - + local carbon; user_sessions = user_sessions and user_sessions.sessions; for _, session in pairs(user_sessions) do -- Carbons are sent to resources that have enabled it @@ -93,6 +83,20 @@ and session ~= target_session -- and isn't among the top resources that would receive the message per standard routing rules and (c2s or session.priority ~= top_priority) then + if not carbon then + -- Create the carbon copy and wrap it as per the Stanza Forwarding XEP + local copy = st.clone(stanza); + if c2s and not orig_to then + stanza.attr.to = bare_from; + end + copy.attr.xmlns = "jabber:client"; + carbon = st.message{ from = bare_jid, type = orig_type, } + :tag(c2s and "sent" or "received", { xmlns = xmlns_carbons }) + :tag("forwarded", { xmlns = xmlns_forward }) + :add_child(copy):reset(); + + end + carbon.attr.to = session.full_jid; module:log("debug", "Sending carbon to %s", session.full_jid); session.send(carbon);
