=== modified file 'src/com/goldencode/p2j/ui/client/gui/driver/web/GuiWebSocket.java'
--- src/com/goldencode/p2j/ui/client/gui/driver/web/GuiWebSocket.java	2016-04-22 16:44:54 +0000
+++ src/com/goldencode/p2j/ui/client/gui/driver/web/GuiWebSocket.java	2016-04-22 19:22:27 +0000
@@ -57,6 +57,7 @@
 import java.io.*;
 import java.security.*;
 import java.util.*;
+import java.util.concurrent.atomic.AtomicInteger;
 
 import org.eclipse.jetty.websocket.api.annotations.WebSocket;
 
@@ -110,11 +111,8 @@
    /** Accumulator to track the total number of pending bytes on the drawing ops list. */
    private int pendingBytes = 0;
    
-   /** Pending resize operations must not be cached */
-   private List<byte[]> resizeOps = new ArrayList<byte[]>();
-
-   /** Pending resize operations in bytes */
-   private int resizeOpsBytes = 0;
+   /** Pending resize operations counter */
+   private AtomicInteger resizeOps = new AtomicInteger(0);
 
    /**
     * Accumulator to track the total number of pending bytes on the drawing ops list, including  
@@ -614,14 +612,7 @@
    {
       allocateAndSend(PaintPrimitives.RESIZE_WINDOW, width, height);
       
-      byte[] message = new byte[9];
-      message[0] = (byte) PaintPrimitives.RESIZE_WINDOW.ordinal();
-      
-      writeMessageInt32(message, 1, width);
-      writeMessageInt32(message, 5, height);
-      
-      resizeOps.add(message);
-      resizeOpsBytes += message.length;
+      resizeOps.incrementAndGet();
    }
    
    /**
@@ -635,6 +626,8 @@
    public void setWindowLocation(int x, int y)
    {
       allocateAndSend(PaintPrimitives.SET_LOCATION, x, y);
+      
+      resizeOps.incrementAndGet();
    }
    
    /**
@@ -653,16 +646,7 @@
    {
       allocateAndSend(PaintPrimitives.SET_WINDOW_BOUNDS, x, y, width, height);
       
-      byte[] message = new byte[17];
-      message[0] = (byte) PaintPrimitives.SET_WINDOW_BOUNDS.ordinal();
-      
-      writeMessageInt32(message, 1,  x);
-      writeMessageInt32(message, 5,  y);
-      writeMessageInt32(message, 9,  width);
-      writeMessageInt32(message, 13, height);
-
-      resizeOps.add(message);
-      resizeOpsBytes += message.length;
+      resizeOps.incrementAndGet();
    }
    
    /**
@@ -1062,7 +1046,12 @@
                                                     pendingNoCacheBytes));
       if (drawHash != null)
       {
-         if (Arrays.equals(drawHash, lastHash))
+         if (resizeOps.getAndSet(0) > 0)
+         {
+            byte[] magic = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+            System.arraycopy(magic, 0, total, 1, HASH_LENGTH);
+         }
+         else if (Arrays.equals(drawHash, lastHash))
          {
             // do not send if duplicated message
             doSend = false;
@@ -1099,17 +1088,6 @@
          lastHash = drawHash;
       }
 
-      if (!resizeOps.isEmpty())
-      {
-         byte[] resize = buildDrawingMessage(windowId, resizeOps, resizeOpsBytes);
-         // the magic value indicates that resize operations must not be cached
-         byte[] magic = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-         System.arraycopy(magic, 0, resize, 1, HASH_LENGTH);
-         sendBinaryMessage(resize);
-         resizeOps.clear();
-         resizeOpsBytes = 0;
-      }
-
       if (doSend)
       {
          // send it to the javascript side