Update app.py

app.py

@@ -73,6 +73,11 @@ with iface:
         api_name= "gen_tree"
     )
 
+iface.queue(
+    max_size=4,
+    concurrency_count=2
+)
+
 iface.launch(
     server_name="0.0.0.0",
     # server_port=9090,