From 73d50258d723dca88aab435c0fd8fea470fc7556 Mon Sep 17 00:00:00 2001
From: Shi Wenbin <bradyjoestar@gmail.com>
Date: Mon, 11 Jul 2022 23:57:08 +0800
Subject: [PATCH] optimize store.write (#12494)

---
 store/cachekv/store.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/store/cachekv/store.go b/store/cachekv/store.go
index 28063504b2..1e7b74ff93 100644
--- a/store/cachekv/store.go
+++ b/store/cachekv/store.go
@@ -101,6 +101,11 @@ func (store *Store) Write() {
 	store.mtx.Lock()
 	defer store.mtx.Unlock()
 
+	if len(store.cache) == 0 && len(store.deleted) == 0 && len(store.unsortedCache) == 0 {
+		store.sortedCache = dbm.NewMemDB()
+		return
+	}
+
 	// We need a copy of all of the keys.
 	// Not the best, but probably not a bottleneck depending.
 	keys := make([]string, 0, len(store.cache))