Add pools for packetack

wrappers/packetack/pools.go

@@ -0,0 +1,37 @@
+package packetack
+
+import (
+	"bytes"
+	"sync"
+)
+
+var (
+	poolClientBytesBuffer = sync.Pool{
+		New: func() interface{} {
+			return &bytes.Buffer{}
+		},
+	}
+	poolProxyBytesBuffer = sync.Pool{
+		New: func() interface{} {
+			return &bytes.Buffer{}
+		},
+	}
+)
+
+func acquireClientBytesBuffer() *bytes.Buffer {
+	return poolClientBytesBuffer.Get().(*bytes.Buffer)
+}
+
+func acquireProxyBytesBuffer() *bytes.Buffer {
+	return poolProxyBytesBuffer.Get().(*bytes.Buffer)
+}
+
+func releaseClientBytesBuffer(buf *bytes.Buffer) {
+	buf.Reset()
+	poolClientBytesBuffer.Put(buf)
+}
+
+func releaseProxyBytesBuffer(buf *bytes.Buffer) {
+	buf.Reset()
+	poolProxyBytesBuffer.Put(buf)
+}