Flask's local request response is slow

The interface is in the Pending state for a long time  

if __name__ == '__main__':
    # manager.run()
    app.run(host='127.0.0.1', port=80, debug=True, threaded=True)

Note: You need to add threaded=True in app.run, and it will start with multi-thread after restarting, so that it supports Google to request resources concurrently