增加对数据库操作的统计命令：edge-node dbstat/减少几个不必要的查询操作

internal/utils/dbs/query_stat_manager_test.go

@@ -0,0 +1,24 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package dbs_test
+
+import (
+	"github.com/TeaOSLab/EdgeNode/internal/utils/dbs"
+	"github.com/iwind/TeaGo/logs"
+	"testing"
+	"time"
+)
+
+func TestQueryStatManager(t *testing.T) {
+	var manager = dbs.NewQueryStatManager()
+	{
+		var label = manager.AddQuery("sql 1")
+		time.Sleep(1 * time.Second)
+		label.End()
+	}
+	manager.AddQuery("sql 1").End()
+	manager.AddQuery("sql 2").End()
+	for _, stat := range manager.TopN(10) {
+		logs.PrintAsJSON(stat, t)
+	}
+}