From 96a65b331dfac09355b24987e76b280b165df77c Mon Sep 17 00:00:00 2001
From: Bill Somerville <g4wjs@classdesign.com>
Date: Thu, 24 Dec 2015 21:37:16 +0000
Subject: [PATCH] Elide duplicate UDP messages

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6315 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
---
 MessageClient.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/MessageClient.cpp b/MessageClient.cpp
index f0592684e..e4260eb6f 100644
--- a/MessageClient.cpp
+++ b/MessageClient.cpp
@@ -74,6 +74,7 @@ public:
 
   // hold messages sent before host lookup completes asynchronously
   QQueue<QByteArray> pending_messages_;
+  QByteArray last_message_;
 };
 
 #include "MessageClient.moc"
@@ -233,7 +234,11 @@ void MessageClient::impl::send_message (QByteArray const& message)
     {
       if (!server_.isNull ())
         {
-          writeDatagram (message, server_, server_port_);
+          if (message != last_message_) // avoid duplicates
+            {
+              writeDatagram (message, server_, server_port_);
+              last_message_ = message;
+            }
         }
       else
         {