From 484dfaebceb8e6dd89f6b9b92e9a0eff0a08bab2 Mon Sep 17 00:00:00 2001
From: vyzo <vyzo@hackzen.org>
Date: Fri, 2 Jul 2021 15:32:55 +0300
Subject: [PATCH] reused cidset across all walks when flushing pending writes

---
 blockstore/splitstore/splitstore.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/blockstore/splitstore/splitstore.go b/blockstore/splitstore/splitstore.go
index 82e98e60f..a51a48e20 100644
--- a/blockstore/splitstore/splitstore.go
+++ b/blockstore/splitstore/splitstore.go
@@ -593,6 +593,7 @@ func (s *SplitStore) flushPendingWrites(locked bool) {
 
 	cids := make([]cid.Cid, 0, len(s.pendingWrites))
 	seen := make(map[cid.Cid]struct{})
+	walked := cid.NewSet()
 	for c := range s.pendingWrites {
 		_, ok := seen[c]
 		if ok {
@@ -607,7 +608,7 @@ func (s *SplitStore) flushPendingWrites(locked bool) {
 			continue
 		}
 
-		err := s.walkLinks(c, cid.NewSet(), func(c cid.Cid) error {
+		err := s.walkLinks(c, walked, func(c cid.Cid) error {
 			_, ok := seen[c]
 			if !ok {
 				cids = append(cids, c)