Tentatively increase the concurrent limit given the queue is very long.

app.py

@@ -90,7 +90,7 @@ with gr.Blocks() as demo:
     sumbit.click(model_chat,
                  inputs=[textbox, chatbot, system_state],
                  outputs=[textbox, chatbot, system_input],
-                 concurrency_limit = 5)
+                 concurrency_limit = 10)
     clear_history.click(fn=clear_session,
                         inputs=[],
                         outputs=[textbox, chatbot])
@@ -99,4 +99,4 @@ with gr.Blocks() as demo:
                         outputs=[system_state, system_input, chatbot])
 
 demo.queue(api_open=False)
-demo.launch(max_threads=5)
+demo.launch(max_threads=10)