# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1637785669 -3600
# Node ID 6da703cb4c04512e819a3363b87fd0cab4bf9b62
# Parent  364c3f018e3a1e1909b622c653e7cbef3150741e
mod_smacks: Optimize scheduling of ack requests

Taking advantage of the new callbacks added in dcf38ac6a38c and
9c450185bac1 avoids extra timers, extra syscalls and sending the `<r>`
in its own TCP segment, improving efficiency.

diff -r 364c3f018e3a -r 6da703cb4c04 plugins/mod_smacks.lua
--- a/plugins/mod_smacks.lua	Wed Nov 24 21:27:49 2021 +0100
+++ b/plugins/mod_smacks.lua	Wed Nov 24 21:27:49 2021 +0100
@@ -236,7 +236,6 @@
 			module:fire_event("smacks-hibernation-stanza-queued", {origin = session, queue = queue, stanza = cached_stanza});
 			return nil;
 		end
-		request_ack_if_needed(session, false, "outgoing_stanza_filter", stanza);
 	end
 	return stanza;
 end
@@ -652,6 +651,8 @@
 local request_ack_events = {
 	["csi-client-active"] = true;
 	["csi-flushing"] = false;
+	["c2s-pre-ondrain"] = false;
+	["s2s-pre-ondrain"] = false;
 };
 
 for event_name, force in pairs(request_ack_events) do