Added timining information around worker thread processes.

src/ebb_worker.erl

@@ -32,7 +32,13 @@ worker(Func, Args, Receiver) ->
     ebb_event:return(Receiver, apply(Func, Args)).
 
 worker(Node, Func, Args, Receiver) ->
+    Ref = make_ref(),
+    io:format("~p ~p: Worker thread started~n", [Node, Ref]),
+    {_, _, Start} = erlang:now(),
     ebb_event:return(Receiver, apply(Func, Args)),
+    {_, _, Finish} = erlang:now(),
+    io:format("~p ~p: Worker thread finished, time ~p~n",
+	      [Node, Ref, Finish-Start]),
     ebb_work_manager:work_finished(Node).
 
 stop(Worker) ->