From 0b89d69de127fd17237006f03417a6129365f3c8 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Fri, 17 Jul 2020 15:22:40 +0200
Subject: [PATCH] Copy state files for backup, instead of serializing

This should speed up backup saves of large session files.
---
 libs/ardour/session_state.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libs/ardour/session_state.cc b/libs/ardour/session_state.cc
index 8c7ccb2c53..5af5f1954d 100644
--- a/libs/ardour/session_state.cc
+++ b/libs/ardour/session_state.cc
@@ -925,9 +925,10 @@ Session::save_state (string snapshot_name, bool pending, bool switch_to_snapshot
 			save_path += "-";
 			save_path += timebuf;
 			save_path += statefile_suffix;
-			if ( !tree.write (save_path) )
+			if (!copy_file (xml_path, save_path)) {
 					error << string_compose(_("Could not save backup file at path \"%1\" (%2)"),
 							save_path, g_strerror (errno)) << endmsg;
+			}
 		}
 
 		StateSaved (snapshot_name); /* EMIT SIGNAL */