Update

app.py

@@ -287,6 +287,9 @@ def main():
                     min_value=1, max_value=10, value=DEFAULT_NUM_SAMPLES,
                 )
 
+                if not GPU_AVAILABLE:
+                    st.warning('No GPU available. Sampling might be very slow.')
+
                 submit = st.form_submit_button('Run')
                 st.session_state.submit = st.session_state.submit or submit
                 if submit: