Memory Leak in LFU Cache Implementation about gcache HOT 4 CLOSED

diff --git a/lfu.go b/lfu.go
index f781a1f..d42d5d2 100644
--- a/lfu.go
+++ b/lfu.go
@@ -181,17 +181,22 @@ func (c *LFUCache) increment(item *lfuItem) {
        currentFreqElement := item.freqElement
        currentFreqEntry := currentFreqElement.Value.(*freqEntry)
        nextFreq := currentFreqEntry.freq + 1
-       delete(currentFreqEntry.items, item)
-
-       nextFreqElement := currentFreqElement.Next()
-       if nextFreqElement == nil {
-               nextFreqElement = c.freqList.InsertAfter(&freqEntry{
-                       freq:  nextFreq,
-                       items: make(map[*lfuItem]struct{}),
-               }, currentFreqElement)
+       if len(currentFreqEntry.items) == 1 {
+               currentFreqEntry.freq = nextFreq
+       } else {
+               delete(currentFreqEntry.items, item)
+
+               nextFreqElement := currentFreqElement.Next()
+               if nextFreqElement == nil {
+                       nextFreqElement = c.freqList.InsertAfter(&freqEntry{
+                               freq:  nextFreq,
+                               items: make(map[*lfuItem]struct{}),
+                       }, currentFreqElement)
+               }
+               nextFreqElement.Value.(*freqEntry).items[item] = struct{}{}
+
+               item.freqElement = nextFreqElement
        }
-       nextFreqElement.Value.(*freqEntry).items[item] = struct{}{}
-       item.freqElement = nextFreqElement
 }
 
 // evict removes the least frequence item from the cache.