优化系统goroutine使用，减少goroutine数量，增加goman查看goroutine数量指令

internal/goman/instance.go

@@ -0,0 +1,12 @@
+// Copyright 2021 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package goman
+
+import "time"
+
+type Instance struct {
+	Id          uint64
+	CreatedTime time.Time
+	File        string
+	Line        int
+}