initial patch: do not throw all xml at once to parser because that freezes UI until process is finished. TODO: a better way to seperate what is left to seperate and send by smaller chunks to parser

src/common/xmpp/dispatcher.py

@@ -32,6 +32,7 @@ class Dispatcher(PlugIn):
     """ Ancestor of PlugIn class. Handles XMPP stream, i.e. aware of stream headers.
         Can be plugged out/in to restart these headers (used for SASL f.e.). """
     def __init__(self):
+        self.in_buffer=''
         PlugIn.__init__(self)
         DBG_LINE='dispatcher'
         self.handlers={}
@@ -110,8 +111,13 @@ class Dispatcher(PlugIn):
             3) 0 (zero) if underlying connection is closed."""
         for handler in self._cycleHandlers: handler(self)
         if self._owner.Connection.pending_data(timeout):
-            data=self._owner.Connection.receive()
-            self.Stream.Parse(data)
+            if not self.in_buffer: 
+                try: self.in_buffer=self._owner.Connection.receive() 
+                except IOError: return
+            data = self.in_buffer[:1024] # parse first 1 MB
+            self.Stream.Parse(data) 
+            self.in_buffer=self.in_buffer[1024:] # parse the rest next time
+            #if data: 
             return len(data)
         return '0'      # It means that nothing is received but link is alive.