From 1e718021dbe294b8fc3d20848295e98b0c5abd6a Mon Sep 17 00:00:00 2001
From: GoEdgeLab <goedgecloud@gmail.com>
Date: Mon, 10 Jan 2022 15:38:53 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BC=98=E5=8C=96=E4=BB=A3=E7=A0=81?=
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---
 internal/utils/expires/list.go      |  6 +++++-
 internal/utils/expires/list_test.go | 18 ++++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/internal/utils/expires/list.go b/internal/utils/expires/list.go
index 560e751..c61caff 100644
--- a/internal/utils/expires/list.go
+++ b/internal/utils/expires/list.go
@@ -63,7 +63,11 @@ func (this *List) Remove(itemId int64) {
 
 func (this *List) GC(timestamp int64, callback func(itemId int64)) {
 	this.locker.Lock()
-	itemMap := this.gcItems(timestamp)
+	var itemMap = this.gcItems(timestamp)
+	if len(itemMap) == 0 {
+		this.locker.Unlock()
+		return
+	}
 	this.locker.Unlock()
 
 	if callback != nil {
diff --git a/internal/utils/expires/list_test.go b/internal/utils/expires/list_test.go
index e491ec4..cb6a2b7 100644
--- a/internal/utils/expires/list_test.go
+++ b/internal/utils/expires/list_test.go
@@ -165,3 +165,21 @@ func Benchmark_Map_Uint64(b *testing.B) {
 		}
 	}
 }
+
+func BenchmarkList_GC(b *testing.B) {
+	runtime.GOMAXPROCS(1)
+
+	var lists = []*List{}
+
+	for i := 0; i < 100; i++ {
+		lists = append(lists, NewList())
+	}
+
+	var timestamp = time.Now().Unix()
+
+	for i := 0; i < b.N; i++ {
+		for _, list := range lists {
+			list.GC(timestamp, nil)
+		}
+	}
+}