Update app.py

app.py

@@ -182,8 +182,8 @@ def main():
                      inputs=[radio, system_input],
                      outputs=[mark_, chatbot, system_state, system_input, textbox])
     
-    demo.queue(api_open=False)
-    demo.launch(max_threads=5)
+    demo.queue(api_open=False,default_concurrency_limit=40)
+    demo.launch(max_threads=40)
 
 
 if __name__ == "__main__":