Rework stats

stats/pools.go

@@ -0,0 +1,20 @@
+package stats
+
+import "sync"
+
+var streamInfoPool = sync.Pool{
+	New: func() interface{} {
+		return &streamInfo{
+			tags: map[string]string{},
+		}
+	},
+}
+
+func acquireStreamInfo() *streamInfo {
+	return streamInfoPool.Get().(*streamInfo)
+}
+
+func releaseStreamInfo(info *streamInfo) {
+	info.Reset()
+	streamInfoPool.Put(info)
+}