Add rpc proxy request

mtproto/bufferpool/bufferpool.go

@@ -0,0 +1,32 @@
+package bufferpool
+
+import (
+	"bytes"
+	"sync"
+)
+
+const bufferPoolSize = 4 * 1024
+
+var bufferPool sync.Pool
+
+func Get() *bytes.Buffer {
+	buf := bufferPool.Get().(*bytes.Buffer)
+	buf.Reset()
+
+	return buf
+}
+
+func Return(buf *bytes.Buffer) {
+	bufferPool.Put(buf)
+}
+
+func init() {
+	bufferPool = sync.Pool{
+		New: func() interface{} {
+			buf := &bytes.Buffer{}
+			buf.Grow(bufferPoolSize)
+
+			return buf
+		},
+	}
+}