From d1e4ec464fec17462dfa6ba3b14f8f37bfb8d49e Mon Sep 17 00:00:00 2001
From: Andrii Skomorokhov <andrii.skomorokhov@flashtalking.com>
Date: Wed, 10 Sep 2025 15:39:24 +0200
Subject: [PATCH] Add ResetKeyMetadata method to resets per-key metadata.

---
 bigcache.go | 8 ++++++++
 shard.go    | 6 ++++++
 2 files changed, 14 insertions(+)

diff --git a/bigcache.go b/bigcache.go
index b3aa37bb..8328e939 100644
--- a/bigcache.go
+++ b/bigcache.go
@@ -188,6 +188,14 @@ func (c *BigCache) ResetStats() error {
 	return nil
 }
 
+// ResetKeyMetadata resets per-key metadata
+func (c *BigCache) ResetKeyMetadata() error {
+	for _, shard := range c.shards {
+		shard.resetKeyMetadata(c.config)
+	}
+	return nil
+}
+
 // Len computes the number of entries in the cache.
 func (c *BigCache) Len() int {
 	var len int
diff --git a/shard.go b/shard.go
index 4f03b53e..d9c25432 100644
--- a/shard.go
+++ b/shard.go
@@ -359,6 +359,12 @@ func (s *cacheShard) resetStats() {
 	s.lock.Unlock()
 }
 
+func (s *cacheShard) resetKeyMetadata(config Config) {
+	s.lock.Lock()
+	s.hashmapStats = make(map[uint64]uint32, config.initialShardSize())
+	s.lock.Unlock()
+}
+
 func (s *cacheShard) len() int {
 	s.lock.RLock()
 	res := len(s.hashmap)