From d37e36dce4818b44a4d95acb74e0d91ab4f62b4d Mon Sep 17 00:00:00 2001
From: Kim Alvefur <zash@zash.se>
Date: Fri, 27 Apr 2018 15:26:29 +0200
Subject: mod_muc_mam: Skip fetching history if built-in recent history is
 enough

---
 plugins/mod_muc_mam.lua | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/plugins/mod_muc_mam.lua b/plugins/mod_muc_mam.lua
index 8c5ea2aa..7e6c9838 100644
--- a/plugins/mod_muc_mam.lua
+++ b/plugins/mod_muc_mam.lua
@@ -254,6 +254,10 @@ module:hook("muc-get-history", function (event)
 		maxstanzas = get_historylength(room);
 	end
 
+	if room._history and #room._history >= maxstanzas then
+		return -- It can deal with this itself
+	end
+
 	-- Load all the data!
 	local query = {
 		limit = maxstanzas;
-- 
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