From 77b1980d8e77889d4b49a2912b9397bcd29588cc Mon Sep 17 00:00:00 2001
From: Michael Eischer <michael.eischer@fau.de>
Date: Fri, 19 Aug 2022 21:10:43 +0200
Subject: [PATCH] repository: MasterIndex.Packs: reduce allocations

---
 internal/repository/master_index.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/internal/repository/master_index.go b/internal/repository/master_index.go
index 058a3a662..05d0fdce2 100644
--- a/internal/repository/master_index.go
+++ b/internal/repository/master_index.go
@@ -150,7 +150,7 @@ func (mi *MasterIndex) Packs(packBlacklist restic.IDSet) restic.IDSet {
 	packs := restic.NewIDSet()
 	for _, idx := range mi.idx {
 		idxPacks := idx.Packs()
-		if idx.final {
+		if idx.final && len(packBlacklist) > 0 {
 			idxPacks = idxPacks.Sub(packBlacklist)
 		}
 		packs.Merge(idxPacks)