From e35ce4c002e0dfb4db76a5108e0028719f469734 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Fri, 25 Nov 2016 10:41:23 +0100
Subject: [PATCH] Speed up AFL/PFL changes for large sessions

update_latency_compensation() and resort_routes() are expensive and
were called for every individual change.
---
 libs/ardour/session.cc | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 0f4c5b4f73..cfb08b48ec 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -6223,11 +6223,14 @@ Session::update_route_record_state ()
 void
 Session::listen_position_changed ()
 {
-	boost::shared_ptr<RouteList> r = routes.reader ();
-
-	for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
-		(*i)->listen_position_changed ();
+	{
+		boost::shared_ptr<RouteList> r = routes.reader ();
+		PBD::Unwinder<bool> uw (ignore_route_processor_changes, true);
+		for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
+			(*i)->listen_position_changed ();
+		}
 	}
+	route_processors_changed (RouteProcessorChange ());
 }
 
 void