From a08a3eb1731e04a3d6c3d51669c31c7f74091950 Mon Sep 17 00:00:00 2001
From: vhadzhiev <vphadzhiev@gmail.com>
Date: Mon, 20 Feb 2023 11:25:28 +0200
Subject: [PATCH] fixed Statistics.__add__(), fixes #7355

---
 src/borg/archive.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/borg/archive.py b/src/borg/archive.py
index 0cd81e784..3c277ce08 100644
--- a/src/borg/archive.py
+++ b/src/borg/archive.py
@@ -79,8 +79,8 @@ class Statistics:
         stats.nfiles = self.nfiles + other.nfiles
         stats.chunking_time = self.chunking_time + other.chunking_time
         stats.hashing_time = self.hashing_time + other.hashing_time
-        for key in other.files_stats:
-            stats.files_stats[key] = self.files_stats[key] + other.files_stats[key]
+        st1, st2 = self.files_stats, other.files_stats
+        stats.files_stats = defaultdict(int, {key: (st1[key] + st2[key]) for key in st1.keys() | st2.keys()})
 
         return stats