add remark

session.go

@@ -445,6 +445,8 @@ func (this *Session) handleLoop() {
 	// ticker = time.NewTicker(this.period) // use wheel instead, 2016/09/26
 LOOP:
 	for {
+		// A select blocks until one of its cases can run, then it executes that case.
+		// It choose one at random if multiple are ready. Otherwise it choose default branch if none is ready.
 		select {
 		case <-this.done:
 			// 这个分支确保(Session)handleLoop gr在(Session)handlePackage gr之后退出

version.go

@@ -16,3 +16,28 @@ const (
 	GETTY_MINOR = 4
 	GETTY_BUILD = 5
 )
+
+/*
+ 几个可能的优化点：
+ 1 session.go:Session中的rQ & wQ 均是channel实现，其本质是bounded queue，所以可能导致读写阻塞，如果想让write更快一点，可以使用list作为wQ的二级队列，以存放优先级比较高的且不能丢弃(在wQ full的情况下)的pkg；
+ 2 codec.go:(EventListener)OnMessage其实可以一次处理多个session.go:Session{rQ}的多个包，如：
+   const MAX = 32
+   for {
+       select {
+           case inPkg = <-this.rQ:
+               if flag {
+                  var pkgArray []interface{}
+                  pkgArray = append(pkgArray, inPkg)
+                  Read:
+                  for i := 0; i < MAX; i++ {
+                      case inPkg = <-this.rQ:
+                          pkgArray = append(pkgArray, inPkg)
+                      default:
+                          break Read
+                  }
+			      this.listener.OnMessages(this, pkgArray)
+			      this.incReadPkgCount(len(pkgArray))
+			   } else {
+			       log.Info("[session.handleLoop] drop readin package{%#v}", inPkg)
+			   }
+*/